Log in

Relevant bibliographies by topics / Industrial Metal Finishing / Journal articles

Journal articles on the topic 'Industrial Metal Finishing'

To see the other types of publications on this topic, follow the link: Industrial Metal Finishing.

Author: Grafiati

Published: 7 September 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Industrial Metal Finishing.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Magalhães, Jorge M., João E. Silva, Fernando P. Castro, and João A. Labrincha. "Physical and chemical characterisation of metal finishing industrial wastes." Journal of Environmental Management 75, no. 2 (April 2005): 157–66. http://dx.doi.org/10.1016/j.jenvman.2004.09.011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Flott, Leslie W. "Metal finishing: An overview." Metal Finishing 97, no. 1 (January 1999): 20–34. http://dx.doi.org/10.1016/s0026-0576(00)83059-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Flott, Leslie W. "Metal finishing: an overview." Metal Finishing 99 (January 2001): 19–33. http://dx.doi.org/10.1016/s0026-0576(01)85260-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Flott, Leslie W. "Metal finishing: an overview." Metal Finishing 100 (January 2002): 16–30. http://dx.doi.org/10.1016/s0026-0576(02)82002-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Kolb, D. M., and M. A. Schneeweiss. "Scanning Tunneling Microscopy for Metal Deposition Studies." Electrochemical Society Interface 8, no. 1 (March 1, 1999): 26–30. http://dx.doi.org/10.1149/2.f05991if.

Full text

Abstract:

Electrolytic metal deposition, particularly from aqueous solution, provides the basis for a number of indispensable industrial applications such as metal winning and refining, metal plating for corrosion protection, and surface finishing. Circuit board manufacturing in microelectronics, in particular, has renewed interest in the research of metal deposition. In addition to its industrial significance, electrodeposition is also of principal interest in regard to its fundamentals, such as, the investigation of electrocrystallization phenomena.

APA, Harvard, Vancouver, ISO, and other styles

6

Durkee, John B. "The future of metal finishing." Metal Finishing 104, no. 9 (September 2006): 60–62. http://dx.doi.org/10.1016/s0026-0576(06)80306-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Tucker, Reginald E. "Metal finishing gets a makeover." Metal Finishing 105, no. 3 (March 2007): 4. http://dx.doi.org/10.1016/s0026-0576(07)00012-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Rakandenu, I. Gede Made Gani, and Dyah Kusuma Wardhani. "KAJIAN PENGARUH PENGGUNAAN SEMEN EKSPOS SEBAGAI FINISHING DINDING INTERIOR TERHADAP PSIKOLOGIS PENGGUNA RUANG." AKSEN 5, no. 2 (May 24, 2021): 43–51. http://dx.doi.org/10.37715/aksen.v5i2.1870.

Full text

Abstract:

The use of exposed cement materials as wall finishing lately is in great demand and is becoming a designtrend at the moment. Many property buildings ranging from commercial buildings such as cafes, restaurants,to hotels to residential buildings such as houses, apartments and condos use exposed cement as one ofthe interior wall finishing. Exposed cement as wall finishing is usually associated with industrial designstyles. In Indonesia, exposed cement is applied as finishing material after bricks. Using exposed cementas wall finish that nowadays has been trending in architecture and interior applicants gives a differentambience of space, home or building yet still economically acceptable. The using of exposed cement aswall finish are close to the using of industrial style. As known, industrial style is an interior architecturedesign style that adopting industries elements such as the using of metal, bricks and pipe material thenbe exposed on purpose. Industrial style has color palette such as black and greyish. Therefore the usingof exposed cement as wall finish often used in industrial design style. However with the popular use ofexposed cement as wall finish does not mean that it can freely acceptable in all situations, because it canaffect the comfort of the room user.

APA, Harvard, Vancouver, ISO, and other styles

9

Valero, Greg. "New editor joins metal finishing team." Metal Finishing 104, no. 7-8 (July 2006): 6. http://dx.doi.org/10.1016/s0026-0576(06)80272-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Kuh, Anselm. "Granted in the metal finishing field." Metal Finishing 102, no. 10 (October 2004): 75–79. http://dx.doi.org/10.1016/s0026-0576(04)84666-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Kuhn, Anselm. "Granted in the metal finishing field." Metal Finishing 102, no. 3 (March 2004): 60–65. http://dx.doi.org/10.1016/s0026-0576(04)90087-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Samonin, V. V., E. A. Spiridonova, A. S. Zotov, M. L. Podvyaznikov, and A. V. Garabajiu. "Adsorbents Made of Inorganic Industrial Waste." Ecology and Industry of Russia 25, no. 12 (December 1, 2021): 15–23. http://dx.doi.org/10.18412/1816-0395-2021-12-15-23.

Full text

Abstract:

Data demonstrate the possibility of manufacturing adsorbents by using inorganic industrial waste and provide raw material list for this purpose. Inorganic waste coming from water treatment, mining and construction industries, solid fuel combustion products, spent inorganic sorbents, catalysts and chemical absorbers, chemical, metallurgical and metal finishing industries waste are used as raw materials. Adsorbents production methods by using inorganic industrial waste have been analysed, and parameters of porous structure and adsorbents sorption activity in terms of organic compounds and cations of non-ferrous metals resulting from aqueous medium are listed.

APA, Harvard, Vancouver, ISO, and other styles

13

DUKE, L. DONALD. "Pollution Prevention and Hazardous Waste Management in Two Industrial Metal Finishing Facilities." Hazardous Waste and Hazardous Materials 11, no. 3 (January 1994): 435–57. http://dx.doi.org/10.1089/hwm.1994.11.435.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Bianchi, Sergio, and Fabrizio Broggi. "Coil Coating: The Advanced Finishing Technology." Key Engineering Materials 710 (September 2016): 181–85. http://dx.doi.org/10.4028/www.scientific.net/kem.710.181.

Full text

Abstract:

Coil Coating is an advanced finishing technology available for different metal substrates, specifically steel and aluminum, with several millions of square meters processed each year. Born in the 60’s, the coil coating technology has gained interest in the market in the late 80’s and 90’s and it’s now booming due its peculiarities both technical as well as environmental and in terms of energy. The Coil Coated product is used in many different applications’ fields: architecture, with facades, cladding, industrial and residential roofing, shutters: transportation, with caravan, train interiors; industry, with caps, closures. The same application technology is widely used for canstock – body, ends and taps: the process concept, being the same, though with remarkable differentiation in terms of speed, metal gauges, application systems and paint qualities (water based, low gauge and highly diluted). The process and the product are both very complex: the Product consists of a combination merging metal, surface treatment and paints; the Process is thus a combination of different steps, perfectly synchronized unique in terms of speed and contact time. Metallurgy, Chemistry, Mechanics, Fluid Dynamics, Energy management: this all comes together within seconds on the same line. For Aluminum, the product features depends on metal alloy – usually 1xxx, 3xxx and 5xxx, with the most different tempers ranging from fully soft through fully hard; different paint types and qualities, ranging from standard Polyester, through the newly developed HDPE and Polyurethane with / without Polyamide to high quality PVdF and Fluopolymers. The presentation will detail these technical features highlighting the significant differences between traditional finishing and Coil Coating

APA, Harvard, Vancouver, ISO, and other styles

15

Popa, Mihaela, Na Wang, Sylvie Descartes, and Ana Maria Trunfio-Sfarghiu. "Role of Surface Industrial Finishing Process of Joint Implant UHMWPE on their Tribological Behaviour." Applied Mechanics and Materials 658 (October 2014): 465–70. http://dx.doi.org/10.4028/www.scientific.net/amm.658.465.

Full text

Abstract:

Joint implants have as bearing couples metal on metal, ceramic on metal and metal on polyethylene. The most widely used bearing couple for artificial joint systems is the combination of a polyethylene (PE) acetabular liner and a cobalt–chromium (Co–Cr) alloy femoral head. Although highly used, it is known that wearing of the polyethylene part of total joint implants is the primary cause of premature failure of total joint replacements [1]. Polyethylene particles tend to migrate into the joint creating inflammation, ostelysis and, in the end the loss of the implant. Industrials use different method for the surface finishing process of the polyethylene part of joint implants that lead to different types of surface morphologies. In this study, using atomic force microscopy technique and tribological methods, we have investigated the influence of polyethylene surface morphology on mechanical properties, degradation and friction. Results have shown that polyethylene surfaces obtained by high speed turning machine lead to low friction coefficient and less degradation of the surface during friction test.

APA, Harvard, Vancouver, ISO, and other styles

16

Andrus, Mark E. "A review of metal precipitation chemicals for metal-finishing applications." Metal Finishing 98, no. 11 (November 2000): 20–23. http://dx.doi.org/10.1016/s0026-0576(00)83532-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Salacinski, T., T. Chmielewski, M. Winiarski, R. Cacko, and R. Świercz. "Roughness of Metal Surface After Finishing Using Ceramic Brush Tools." Advances in Materials Science 18, no. 1 (March 1, 2018): 20–27. http://dx.doi.org/10.1515/adms-2017-0024.

Full text

Abstract:

AbstractThe paper describes processes of metal parts edges deburring and surface of metal samples polishing with ceramic tools based on fibre aluminium oxide. It presents the construction of basic types of tools and their practical industrial applications, and evaluates the influence of machining parameters on surface roughness. An important advantage of the used tools is the possibility of deburring and machining of external flat and shaped surfaces as well as internal surfaces and even deep drilled holes. These tools can be practically used for machining all construction materials. The results of machining of selected engineering materials, such as aluminium 5052 and 2017A, Inconel 718, non-alloy steel, in various variants of machining parameters are presented. The influence of machining parameters on machined surface roughness was described.

APA, Harvard, Vancouver, ISO, and other styles

18

Kuhn, Anselm. "New developments in the metal finishing field." Metal Finishing 103, no. 12 (December 2005): 59. http://dx.doi.org/10.1016/s0026-0576(05)80869-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Kodácsy, János. "Finishing of Metal Parts in Magnetic Field Based on Abrasion." Advanced Materials Research 325 (August 2011): 517–22. http://dx.doi.org/10.4028/www.scientific.net/amr.325.517.

Full text

Abstract:

Denomination Magnetism Aided Machining (MAM) comprises a number of relatively new industrial machining processes (mainly finishing and surface improving) developed presently, too. MAM is effective – among others – for polishing, deburring and burnishing ofmetal parts. The magnetic force makes these processes simpler and more productive. Machining force is generated by an adjustable electromagnetic field between two magnetic poles within the working area ensuring the necessary pressure and speed difference between the tools (abrasive grains, pellets or rollers) and the workpieces. The authors give a brief outline of these modern processes. The paper summarizes the results of the experimental research carried out by the authors mainly in the field of Magnetic Abrasive Polishing (MAP) and Magnetic Abrasive Barrel Deburring (MABD).

APA, Harvard, Vancouver, ISO, and other styles

20

Macko, Rudy, and Wendy Searight. "Wastewater from processing: Microfiltration in metal finishing plants." Filtration & Separation 45, no. 7 (September 2008): 30–33. http://dx.doi.org/10.1016/s0015-1882(08)70260-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Boschetto, Alberto, Luana Bottini, Luciano Macera, and Francesco Veniali. "Post-Processing of Complex SLM Parts by Barrel Finishing." Applied Sciences 10, no. 4 (February 19, 2020): 1382. http://dx.doi.org/10.3390/app10041382.

Full text

Abstract:

Selective laser melting (SLM) enables the production of metal complex shapes that are difficult or impossible to obtain with conventional production processes. However, the attainable surface quality is insufficient for most applications; thus, a secondary finishing is frequently required. Barrel finishing is an interesting candidate but is often applied without consistent criteria aimed at finding processing parameters. This work presents a methodology based on Bagnold number evaluation and bed behavior diagram, developed on experimental apparatus with different charges and process parameters. The experimentation on an industrial machine and the profilometric analysis allowed the identification of appropriate process parameters and charge media for finishing the investigated materials (Ti6Al4V and Inconel718). Two case studies, characterized by complex shapes, were considered, and consistent surface measures allowed understanding the capability of the technology.

APA, Harvard, Vancouver, ISO, and other styles

22

Han, Guang Chao, Ming Sun, Hai Ou Zhang, and Gui Lan Wang. "Research on the Robotic Free Abrasive Polishing System for the Rapid Spray Metal Tooling." Key Engineering Materials 373-374 (March 2008): 770–73. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.770.

Full text

Abstract:

In the rapid spray metal tooling, metal film is spray-formed on the substrate and supported under the back, which will act as the working surface of the rapid metal tool finally. So the finishing process for the sprayed metal film is important to the quality and the lifecycle of the rapid metal tool. The finishing of the metal mould is frequently carried out manually, these kinds of operations are iterative, time consuming and require experience. Automation can introduce cost reduction minimizing production times on such manual finishing operations. This paper presents a robotic polishing system with free abrasive for the finishing of the rapid spray metal tool, which is consisted of a six-degree-of-freedom industrial robot manipulator, a high speed electrical polishing spindle and a numerical swivel table. Soft polishing pad and free abrasive are also selected for the robotic polishing system. The path planning is so important to the robotic polishing system that a partition & flexible path mapping method basing on UG CAM is developed to generate the uniform robotic polishing path on the complex mould surface. UG/Open GRIP programming module is used to generate the driving paths with different path intervals on the predesigned plane for each partitioned part. When the driving paths are projected to the mould curved surface, the uniform polishing paths with NC code can be generated by the multi-axis CAM module of the UG. And the path with NC code can then be transformed to the robotic polishing path. According to the elastic deformation and the abrasion of the soft polishing tool, the robotic polishing path should be adjusted to keep the smooth polishing process by offsetting the pre-compressed value and the abrasive compensation value along the polishing axis direction. Technical parameters of the robotic polishing process are also optimized through the experiments. Finally, the rapid metal punch mould is finished to test the robotic polishing system.

APA, Harvard, Vancouver, ISO, and other styles

23

Modikwe, Thembisile, Nthabiseng Maledi, Ntombi Mathe, Sisa Pityana, Modupeola Dada, and Washington Makoana. "Post-processing of direct metal deposited AlCrCoCuFeNi HEA using centrifugal barrel finishing." MATEC Web of Conferences 370 (2022): 06007. http://dx.doi.org/10.1051/matecconf/202237006007.

Full text

Abstract:

Stainless steels, Ni-based alloys, Ti-based alloys, and more recently high entropy alloys have been used in the aerospace industry to improve the exterior properties of components and coatings that require a fine surface finishing with over high temperature range. High- entropy alloys (HEA) have become a ground-breaking research field that provides solutions for structural/ functional materials in the aerospace industry. These alloys, fabricated via direct metal deposition, have better properties than those produced by arc melting. However, the poor surface finish acquired by the layer-by-layer laser deposition process fails to meet the industrial requirements. The implementation of surface treatment by centrifugal barrel finishing is employed to improve the surface roughness of AlCoCrCuFeNi laser deposited HEA. The results have shown a minimum surface roughness decrease of 40%. Thus, an improved surface finish was achieved.

APA, Harvard, Vancouver, ISO, and other styles

24

Joseph, David. "The ABCs of pH measurement in metal finishing." Metal Finishing 101, no. 7-8 (July 2003): 36–43. http://dx.doi.org/10.1016/s0026-0576(03)90188-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Onsager, Steven. "Energy Efficient Washers and Ovens for the Metal Finishing Industry." Manufacturing Letters 33 (September 2022): 82–94. http://dx.doi.org/10.1016/j.mfglet.2022.07.048.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Kim, Uk Su, and Jeong Woo Park. "High-Quality Surface Finishing of Industrial Three-Dimensional Metal Additive Manufacturing Using Electrochemical Polishing." International Journal of Precision Engineering and Manufacturing-Green Technology 6, no. 1 (January 2019): 11–21. http://dx.doi.org/10.1007/s40684-019-00019-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Bhandari, Vandana, Seiko Jose, Pratikhya Badanayak, Anuradha Sankaran, and Vysakh Anandan. "Antimicrobial Finishing of Metals, Metal Oxides, and Metal Composites on Textiles: A Systematic Review." Industrial & Engineering Chemistry Research 61, no. 1 (January 2, 2022): 86–101. http://dx.doi.org/10.1021/acs.iecr.1c04203.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Annamaria, Gisario, Barletta Massimiliano, and Veniali Francesco. "Laser polishing: a review of a constantly growing technology in the surface finishing of components made by additive manufacturing." International Journal of Advanced Manufacturing Technology 120, no. 3-4 (February 21, 2022): 1433–72. http://dx.doi.org/10.1007/s00170-022-08840-x.

Full text

Abstract:

AbstractAdditive manufacturing is a vanguard production technology that has contributed greatly to speed up replacing on the market of complex-shaped components. A delicate and unavoidable phase of additive technology is that relating to the post-processing of the components, especially the finishing process. Post-processing needs to be automated and made scalable so that the technology can actually be adopted also for mass production. In this respect, an emerging post-processing technology suitable for surface finishing, not in contact and easily automatable, is the one that involves the use of laser sources, known by the name of laser polishing. Laser polishing is spreading, in fact, more and more strongly, in the field of manufacturing as a valid alternative to conventional technologies for the surface finishing of metallic components obtained by additive processes. Laser polishing is widely considered very suitable to improving the surface finish of metal components. When compared with the conventional finishing technologies, laser polishing has many benefits in terms of costs and process times especially if automated, through the use of CNC systems and scanning heads. In this manuscript, the knowledge of this technology is deepened through a review of the relevant literature that highlights the aspects of the interaction of the laser beam with the metal alloys most frequently used in 3D printing, without neglecting the importance of the thermo-mechanical properties that derive from it. The analysis conducted on the technology of laser polishing aims therefore at evaluating the potential applications in industrial engineering, mainly with regard to the surfaces quality achievable as a result of the polishing of metal components fabricated by additive manufacturing.

APA, Harvard, Vancouver, ISO, and other styles

29

Singleton, Ray. "Enhanced automation of plating and metal finishing barrel process operations using automatic barrels for bulk finishing." Metal Finishing 107, no. 12 (December 2009): 38–39. http://dx.doi.org/10.1016/s0026-0576(09)80424-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Shea, Quin. "EPA mandate: A losing proposition for metal finishing industry." Metal Finishing 104, no. 9 (September 2006): 8. http://dx.doi.org/10.1016/s0026-0576(06)80294-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

"Metal-finishing chemicals." Metal Finishing 98, no. 3 (March 2000): 72. http://dx.doi.org/10.1016/s0026-0576(00)81520-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

"Metal-finishing systems." Metal Finishing 97, no. 11 (November 1999): 86. http://dx.doi.org/10.1016/s0026-0576(00)82218-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

"Metal-finishing processes." Metal Finishing 97, no. 6 (June 1999): 155–56. http://dx.doi.org/10.1016/s0026-0576(00)83962-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

"Rosler Metal Finishing." Metal Finishing 103 (September 2005): 10. http://dx.doi.org/10.1016/s0026-0576(05)80699-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

"Rosler Metal Finishing." Metal Finishing 107, no. 5 (May 2009): S8. http://dx.doi.org/10.1016/s0026-0576(09)80197-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

"Metal-finishing chemicals." Metal Finishing 100, no. 2 (February 2002): 122. http://dx.doi.org/10.1016/s0026-0576(02)80198-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

"Metal finishing services." Metal Finishing 102, no. 1 (January 2004): 49. http://dx.doi.org/10.1016/s0026-0576(04)90036-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

"Metal-finishing software." Metal Finishing 93, no. 3 (March 1995): 78. http://dx.doi.org/10.1016/0026-0576(95)90668-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

"Metal-finishing systems." Metal Finishing 95, no. 1 (January 1997): 84. http://dx.doi.org/10.1016/s0026-0576(97)81883-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

"Metal Finishing Composition." Metal Finishing 96, no. 4 (April 1998): 87. http://dx.doi.org/10.1016/s0026-0576(97)86729-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

"Courses in metal finishing." Metal Finishing 98, no. 1 (January 2000): 872. http://dx.doi.org/10.1016/s0026-0576(00)80188-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

"Houghton Metal Finishing Co." Metal Finishing 97, no. 6 (June 1999): 51. http://dx.doi.org/10.1016/s0026-0576(00)83770-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

"Metal finishing product news." Metal Finishing 104 (March 2006): 1–15. http://dx.doi.org/10.1016/s0026-0576(06)80330-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

"Metal finishing product news." Metal Finishing 109, no. 6 (September 2011): 52–53. http://dx.doi.org/10.1016/s0026-0576(13)70029-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

"Metal Finishing Product News." Metal Finishing 110, no. 4 (May 2012): 58–59. http://dx.doi.org/10.1016/s0026-0576(13)70136-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

"Courses in metal finishing." Metal Finishing 99 (January 2001): 863. http://dx.doi.org/10.1016/s0026-0576(01)85339-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

"Courses in metal finishing." Metal Finishing 100 (January 2002): 854. http://dx.doi.org/10.1016/s0026-0576(02)82082-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

"AUtomated metal-finishing systems." Metal Finishing 96, no. 1 (January 1998): 81–82. http://dx.doi.org/10.1016/s0026-0576(97)80289-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

"What's happening in metal finishing." Metal Finishing 98, no. 12 (December 2000): 84–85. http://dx.doi.org/10.1016/s0026-0576(00)80112-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

"What's happening in metal finishing." Metal Finishing 98, no. 4 (April 2000): 89–90. http://dx.doi.org/10.1016/s0026-0576(00)81796-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!