In the environment of oil refining plant, corrosion is caused mainly by sulfid and acidity medium.

于炼厂装置的腐蚀主要是中的硫化物和酸性介质所产生。

When metal-bearing solution moved along deep faults to cavities or frac tures, the metal cations reated with pyrite and organic matter and precipitated as sulfid...

在构造减压带中，铅物交代地层中的黄铁矿或被有机质还而沉淀富集。