The difference between hot-dip galvanized steel pipe and galvanized steel pipe

first, the principles of hot-dip galvanized steel pipes and galvanized steel pipes are different
1. hot-dip galvanized steel pipe: to improve the corrosion resistance of steel pipes, ordinary steel pipes are galvanized.
2. galvanized steel pipe: galvanized steel pipe reacts molten metal with the iron matrix to produce an alloy layer, thereby combining the matrix and the coating.

second, the characteristics of hot-dip galvanized steel pipes and galvanized steel pipes are different
1. hot-dip galvanized steel pipe: the surface of the galvanized steel pipe should have a complete galvanized layer, and there should be no uncoated black spots and bubbles. small rough surfaces and local zinc tumors are allowed.
2. galvanized steel pipe: to ensure the uniformity of the galvanized layer, the steel pipe sample must not turn red (copper-plated color) after being immersed in copper sulfate solution for 5 consecutive times.

third, hot-dip galvanized steel pipes and galvanized steel pipes have different uses
1. hot-dip galvanized steel pipes: the iron pipes used for gas, greenhouses, and heating are also galvanized steel pipes. as water pipes, galvanized steel pipes produce a lot of rust and scale inside the pipes. the yellow water flowing out not only pollutes the sanitary ware but is also mixed with rough inner walls. the breeding of bacteria and rust causes excessive heavy metal content in the water, seriously endangering human health.
2. galvanized steel pipe: widely used in agricultural greenhouses, fire protection, gas, water supply and drainage, and other fields.