The two special cement coatings are applicable to sewage pipeline internal corrosion for ductile iron pipe, improve the ability to resist the erosion of acid components in sewage.

这两种特殊水泥涂层均适用于污水管道用球墨铸铁管的内防腐，提高抵抗污水中酸碱成分的侵蚀能力。

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Chemical and petrochemical plants have long displayed a preference for ductile iron because of its ability to withstand shock loads, either thermal or physical.

由于球墨铸铁具有良好的耐冲撞装卸性能，及热学和物理性能，所以长期以来，化工厂和石化企业就特别爱好使用球墨铸铁。

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