sch40 sch80 hot dipped galvanized steel pipe

Galvanized pipes, also known as galvanized steel pipes, are divided into hot dip galvanized and electro-galvanized. The hot-dip galvanizing layer is thick, the coating is uniform, the adhesion is strong, and the service life is long. The cost of electroplating is low, the surface is not smooth, and the corrosion resistance is worse than that of hot-dip galvanized pipes. Galvanized pipes include galvanized round pipes, galvanized square pipes, galvanized seamless pipes, galvanized welded pipes, etc. Generally, galvanized steel pipes are seamed steel pipes. Seamless steel pipes are galvanized only on special request.

Hot dip galvanized pipe

Hot-dip galvanized pipe is to make the molten metal react with the iron matrix to produce an alloy layer, so that the matrix and the 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 the tank of ammonium chloride or zinc chloride aqueous solution or mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to the in the hot dip bath. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. The hot-dip galvanized steel pipe substrate undergoes complex physical and chemical reactions with the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a compact structure. The alloy layer is integrated with the pure zinc layer and the steel pipe substrate, so it has strong corrosion resistance.

Hot-dip galvanized and cold-galvanized appearance

The appearance of cold galvanizing is smoother and brighter, and the color passivation process coating is yellow-green and colorful. The coating is blue-white or white, the white passivation treatment is green, and the passivation treatment of the white coating is significantly colorful with the sun angle. The angular parts of complex workpieces are prone to "electric burning" and consist of dark, zinc-thick parts. It is easy to form a current dead dark current gray area at the inner corner, and the zinc layer in this area is relatively thin. The overall zinc nodule and agglomeration of the workpiece.

Hot dip galvanized looks a bit rougher and silvery white than electrogalvanized, and looks prone to process water lines and a few drops of tumor, especially on one end of the workpiece. The hot-dip galvanized zinc layer is several times thicker than electro-galvanized, and its corrosion resistance is several times that of electro-galvanized.

FAQ：

Q: What products does your company have?

A: Our company produces all kinds of galvanized sheets, coils, tubes, steel strips, galvanized sheets, coils, steel strips, PPGI/PPGL, roof panels, etc. Production experience, support customization.

Q: What are the advantages of your company?

A: (1): Prime quality and Competitive price.

     (2): Excellent experiences with after-sale service.

     (3): Every process will be checked by responsible QC which insures every product's quality.

     (4): Professional packing teams which keep every packing safely.

     (5): Samples can be provided as your requirements.

Q: What is your terms of payment ?

A: Can be negotiated by both parties. If you have another question, pls feel free to contact us as below.

Q: What about your price?

A: Our price is very competitive.

     Pls feel free to contact us if you are interested in our products.

Q: How long is your delivery time?

A: Stock steel/Steel for simple cutting/Small amount of general standard steel: about 5-20 days for delivery; Custom steel/bulk steel: about 15-30 days for delivery. Contact us for specific delivery times.