Depending on the thickness, the square is also different, with an average of 5-10 dollars per square meter.
Most countries usually adopt hexavalent chromium passivation, and European countries default to trivalent chromium passivation.
Trivalent chromium passivation is more environmentally friendly, the price is relatively expensive, the corrosion resistance is greatly improved, and different colors of passivation films can be obtained.
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