Metalcorrosion under natural environment is called atmospheric corrosion, the steel with the characteristic of atmospheric corrosion resistance is named weather resisting steel.
金属在自然环境条件下的腐蚀称为大气腐蚀，因而对能在大气自然环境条件下耐腐蚀的钢称为耐大气腐蚀钢。
2
The present invention relates to new-type expansion joint with corrugate pipe consisting of corrosion-resisting lining and clad metal.