Common phenomenon of ZAM steel with black spots

Nowadays, some of our clients ask us about the problem of black spot of ZAM steel. But now it is really a normal phenomenon, let us tell you the reason.

But at present, domestic manufacturers are adjusting the program, to provide the market with the review of demand products. For Zinc-aluminum-magnesium steel, because it is ternary alloy, and magnesium ion is more active, so the product surface of a few domestic steel mills generally exists black spot problem, and it is unpredictable.In addition, from the board surface, several steel mills are also adjusting, some from dark to bright, some from bright to dark, so the inventory from different time , will indeed have color deviation;The last factor is: zinc-aluminum-magnesium products are widely used, with different application, and configuration of different ordering standards, such as: passivation + oiling, non-passivation + oiling, passivation + non-oiling, non-passivation + non-oiling, and fingerprint resistance, so can be used in a small batch process, have encountered different problems. But these are real things which won’t effect the using of the steel.

Up till now, MESCO still have very good price policy for big order of ZAM steel, if you have requests, you can contact us freely.

Website:www.mescosteel.com.cn

Email: mescosteel@aliyun.com