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

由于炼厂装置腐蚀主要是由原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，配合物交代地层黄铁矿或被有机质还原而沉淀富集。