Corrosion is aggravated locally by pollutants deriving from the operation of a plant (for example acids, alkalis or salts, organic solvents, aggressive gases and dust particles).

• 工厂里出来的污染物使腐蚀局部恶化（如：酸，碱或盐，有机溶剂，侵略性气体和尘粒。）