The erosions factors are soil corrosion, bacteria corrosion and the construction quality of the anticorrosive coating is inferior. By zinc and chrome-plated on the surface of the  Seamless Steel Tube, the capability of prevent corrosion can be improved a lot.

Outer wall of the Seamless Steel Pipe plus anti-corrosion coating can increase the loop resistance, reduce corrosion current.Anti-corrosion coating is for the surface, cathodic protection affect a permanent cure. However, if the anti-corrosion coating is damaged, exposed iron will accelerate localized corrosion. Therefore, the combination of anti-corrosion coating and cathodic protection is the best method, which is economic and effective.