The surface corrosion was worst where the paint had flaked off.

油漆已经剥落的地方，表面的腐蚀最严重。

《柯林斯英汉双解大词典》

Due to reasons such as iron damp surface corrosion.

因受潮等原因造成铁芯表面锈蚀。

youdao

In addition, the passivator reduces the surface corrosion in the fuel cell system.

此外，钝化剂减少燃料电池系统的表面腐蚀。

youdao