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How to Blacken Galvanized Steel Plate during Cleaning

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In the process of cleaning and degreasing, high quality Galvanized Corrugated Steel Sheets often appear surface corrosion, blackening or hanging ash. What are the causes of this phenomenon? How to solve and prevent it? Zinc is an amphoteric metal in non-ferrous metals. The chemical activity of zinc metal is very high. It is easy to …

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