corrode
verb [ I or T ] uk/kəˈrəʊd/ us/kəˈroʊd/
（使）腐蚀;侵蚀
If metal corrodes, or if something corrodes it, it is slowly damaged by something such as rain or water.
Steel tends to corrode faster in a salty atmosphere. 在盐分高的环境里，钢往往腐蚀得更快。