140mm drywall screws
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140mm drywall screws1. Principle. Because zinc does not change easily in dry air, and in humid air, the surface can form a very dense film of zinc carbonate, which can effectively protect the interior from corrosion. And when the coating is damaged for some reason and the matrix is not too large, the zinc and steel matrix form a micro cell, so that the fastener matrix becomes the cathode and is protected. It is widely used in automobile transportation and other industries, but what is needed is the trivalent chromium passivation layer, zinc nickel alloy plating closed coating, reduce the harmful and toxic layer of hexavalent chromium passivation.
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140mm drywall screws 【140mm drywall screws】
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140mm drywall screws1. Electroplating process control
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140mm drywall screws 【140mm drywall screws】
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140mm drywall screws 【140mm drywall screws】
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140mm drywall screwsHot dip galvanizing, also known as hot dip galvanizing, is a method of obtaining a metal covering layer by immersing a steel member into a molten zinc solution. With the rapid development of high-voltage power transmission, transportation and communication, the protection requirements for steel parts are becoming higher and higher, and the demand for hot-dip galvanizing is also increasing. Usually the thickness of electrogalvanized layer is 5 ~ 15μm, and the large roll galvanized wire layer is generally more than 35μm, or even up to 200μm. Hot dip galvanized coating ability is good, dense coating, no organic inclusions.
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140mm drywall screws 【140mm drywall screws】
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140mm drywall screws 【140mm drywall screws】
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140mm drywall screws 【140mm drywall screws】
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140mm drywall screwsHot dip galvanized coating is also relatively thick, but there is an uneven situation, for example, the thickness of the thin is only 45 microns, thick can reach 300 microns or even thicker, the color of this product is relatively dark. There is also a lot of zinc consumed in the production process. Zinc will form an infiltration layer with the metal. Its advantage is that it has good corrosion resistance. Electrogalvanizing, it is through the plating tank in the zinc one-way plating on the outside of the metal products, this way of making products is relatively slow, but its thickness is more uniform.
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140mm drywall screws 【140mm drywall screws】
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140mm drywall screws 【140mm drywall screws】
Read More2, the smelting process of the production enterprise will also affect the corrosion resistance of stainless steel.
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140mm drywall screws 【140mm drywall screws】
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140mm drywall screws
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140mm drywall screws 【140mm drywall screws】
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