提高冷拔鋼管耐腐蝕能力最為之有效的辦法

為提高冷拔鋼管的耐腐蝕性能，對一般冷拔鋼管進行鍍鋅。鍍鋅冷拔鋼管分熱鍍鋅和電鍍鋅兩種回落明顯，熱鍍鋅鍍鋅層厚，電鍍鋅成本低，表面不是很光滑。吹氧冷拔鋼管：用作煉鋼吹氧用管，一般用小口徑的焊接冷拔鋼管，規格由3/8-2寸八種。用08、10、15、20或者195-Q235的鋼帶制作成的，為瞭防腐蝕鍍鋅冷拔鋼管，有的要進行有效滲鋁處理。
In order to improve the corrosion resistance of cold-drawn steel tubes, galvanizing is applied to common cold-drawn steel tubes. Galvanized cold-drawn steel pipes fall obviously in hot-dip galvanizing and galvanizing. Hot-dip galvanizing has thick galvanizing layer, low galvanizing cost and not very smooth surface. Oxygen-blowing welded pipe: used as oxygen-blowing pipe for steelmaking, generally used small-caliber welded cold-drawn steel pipe, specifications from 3/8-2 inch eight. In order to prevent corrosion of galvanized cold-drawn steel pipes, some steel strips made of 08, 10, 15, 20 or 195-Q235 should be aluminized effectively. 無錫鍍鋅管廠報道稱冷鍍鋅就是電鍍鋅，鍍鋅量很少，隻有10-50g/m2相關建議，其本身的耐腐蝕性比熱鍍鋅管相差很多。正規的鍍鋅管生產廠傢，為瞭保證質量，大多不采用電鍍鋅(冷鍍)。隻有那些規模小、設備陳舊的小企業采用電鍍鋅高效耐磨，當然他們的報價也相對便宜一些。今後不準用冷鍍鋅管作水、煤氣管。熱鍍鋅冷拔鋼管冷拔鋼管基體與熔融的鍍液發生復雜的物理、化學反應意見反饋，形成耐腐蝕的結構緊密的鋅一鐵合金層。合金層與純鋅層、冷拔冷拔鋼管基體融為一體。故其耐腐蝕能力強。
Wuxi Galvanized Pipe Factory reported that cold galvanizing is galvanizing, the amount of galvanizing is very small, only 10-50g/m2 related recommendations, its corrosion resistance is much different than hot galvanized pipes. Normal galvanized pipe manufacturers, in order to ensure quality, mostly do not use galvanized (cold plating). Only those small enterprises with old equipment and small 环氧地坪scale adopt galvanizing for high effic印花地坪iency and wear resistance. Of course, their quotation is relatively cheap. Cold galvanized pipes shall not be used as water or gas pipes in the future. Complex feedback of physical and chemical reactions occurs between the matrix of hot-dip galvanized cold-drawn steel pipe and the melting bath, resulting in a zinc-iron alloy layer with a close corrosion resistance structure. The alloy layer is integrated with pure zinc layer and cold-drawn steel tube matrix. Therefore, it has strong corrosion resistance.
冷鍍鋅冷拔鋼管鋅層是電鍍層工藝流程，鋅層與冷拔鋼管基體獨立分層。鋅層較薄，鋅層簡單附著在冷拔鋼管基體上企業投資，容易脫落。故其耐腐蝕性能差。在新建住宅中鍍鋅冷拔鋼管，禁止使用冷鍍鋅冷拔鋼管作為給水管。
The zinc layer of cold-drawn galvanized steel pipes is an electroplating process, and the zinc layer is separately stratified from the base of cold-drawn steel pipes. The zinc layer is thin, and the zinc layer simply adheres to the cold-drawn steel tube matrix for enterprise investment, which is easy to fall off. Therefore, its corrosion resistance is poor. It is forbidden to use galvanized cold-drawn steel pipes as water supply pipes in newly built residential buildings.