What is a hot dip galvanized conduit?

the hot-dip galvanized conduit is a hot-dip galvanized metal conduit.

Hot dip galvanized pipe is an alloy layer produced by reacting molten metal with iron matrix, so that the matrix and coating are combined. Hot dip galvanizing is to pickle the steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in a tank of ammonium chloride or zinc chloride aqueous solution or mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to a hot dip plating tank. Hot dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. Complex physical and chemical reactions occur between the steel tube matrix and the molten plating solution, forming a corrosion-resistant zinc-iron alloy layer with compact structure. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix. Therefore, it has strong corrosion resistance.

1. Uniformity of galvanized layer: steel pipe samples shall not turn red (copper plating color) after being immersed in copper sulfate solution for 5 times continuously

2. Surface quality: the surface of galvanized steel pipe shall have a complete galvanized layer, and there shall be no unpainted black spots and bubbles, and minor rough surfaces and local zinc nodules are allowed.

3. zinc coating weight: according to the requirements of the buyer, the zinc coating weight of galvanized steel pipe can be measured, and the average value should be not less than 5g/ m2, and any sample should be not less than 48g/ m2.