Products Finishing

SEP 2018

Products Finishing magazine is the No. 1 industrial finishing publication in the world. We keep our readers informed about the latest news and trends in plating, painting, powder coating, anodizing, electrocoating, parts cleaning, and pretreatment.

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Page 28 of 59

AN AXALTA COATING SYSTEMS BRAND PRODUCTS FINISHING — 27 reemerging of surface defects or over- etching, which results in non-uniform surface appearance. On the other hand, the concentra- tion of dissolved aluminum in the low caustic bath can increase the benefi- cial effect of the acid etch process to disguise the defects originating from the raw material. The data has clearly shown that, above 50 g/l concentration, the benefi- cial effect of dissolved aluminum also starts to decrease as a result of the extended time in the low caustic bath. Furthermore, during full-scale produc- tion, increasing the aluminum concen- tration in the bath will also increase the viscosity of the bath, thus inhib- iting another advantage of the acid etch process, which is lesser dragout and lesser caustic residue for complex shaped profiles. Visit for the full paper with annotations. Akkaya, Afsin, Urgen and Akyil are with Politeknik Metal San. Tic. A.S., a member of Coventya Group, For information, contact Michael McGinty at Figure 5. SEI/SEM images of the second set samples, all pretreated in acid etch bath and post-treated in low caustic. A thermoplastic powder technology designed to provide long-term corrosion protection for metal in the most demanding environments. + Excellent corrosion and abrasion protection + Graffi ti resistant + Superior resistance to salt, sea, sand and sun + Approved for contact with food and drinking water + Field repairable Quality You Can Count On AXALTA COATING SYSTEMS Plascoat PPA 571 LOW CAUSTIC ETCH BATHS

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