Summary for plasma cut edges don't galvanize Discussion
Plasma cut edges don't galvanize well, and Yilmaz Yildirim asked for a faster, cheaper way to prepare S355J2 structural steel after plasma cutting because the cut surface would not accept zinc coating. He had been grinding about 1 mm from the edge, which solved the adhesion problem but took too much time, and sand blasting did not help because the galvanizing still broke down again. The thread excerpt provided here contains only the question, so no named answerers or alternative methods are shown. The practical issue is that plasma-cut edges may need additional edge preparation before galvanizing, but the excerpt does not include a confirmed better process or final solution.
December 26, 2013
Q. Dear All,
We are using structural steel and the quality of materials are S355J2 and we are cutting the plates with plasma. I need to know something about zinc coating after plasma cutting. After plasma cutting, material’s cut surface is not accepting the zinc coating, so we are grinding the cutting surface approximately 1 mm and we solved the problem. This method is taking too much time, so we need to find a different way for solve this problem. We tried sand blasting, but galvanizing is broken again. Can anybody help me?
YILMAZ YILDIRIM
Metallurgy and Materials Engineer – TARSUS, Mersin, TURKEY