The Ji'nan galvanized pipe makes the molten metal react with the iron matrix to produce the alloy layer, which combines the two layers of the matrix and the coating. Hot galvanizing is to pickle steel pipes first, then remove iron oxide on the surface of steel pipes, then pickle them, then rinse them with ammonium chloride or zinc chloride water solution or ammonium chloride and zinc chloride mixed water solution tank, then put them into hot water bath.
Hot dip galvanizing has many advantages, such as uniform coating, strong adhesion, long service life and so on. But the cold galvanized steel pipe is different, the cold galvanizing and galvanizing, the galvanized layer is very small, only 10 - 50g/m2, its corrosion resistance is much different than the hot galvanized pipe. Regular Ji'nan galvanized pipe manufacturers, in order to ensure the majority of the quality of zinc plating.
Galvanized steel pipe with steel grade and chemical composition should be in accordance with the grade of Clarinet and the chemical composition standard of steel. Uniformity of galvanized steel pipe should be tested for uniformity of galvanized steel. The steel tube specimens are impregnated for 5 times continuously in the copper sulfate solution and can not be red.
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