Metal corrosion can be classified as totalcorrosion and part corrosion according to its morphology.
金属腐蚀按其形态可分为全面腐蚀和局部腐蚀两大类。
2
Biogenic corrosion of sewers represents a cost of approximately 10% of total sewage treatment cost and is further increasing.
污水管道的生物腐蚀造成的损失占污水处理总成本的10%，在一些地方这个比例还在进一步增大。
3
The total quantity of corrosion surface defect is decreased due to the decrease of grain boundary energy with the increase of grain size and the atmospheric corrosion resistance is increased.