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运输煤或铁矿的货车，其车体因腐蚀和磨粒磨损很容易快速老化。碳素钢车体使用不到４年就可能要修理，并且它们的使用年限很少超过１６～２０年。在南非，Ｓｐｏｏｒｎｅｔ公司在理查兹湾煤炭出口线路上运营的煤车，其车体材料为８号低碳钢和Ｃｏｒｔｅｎ Ａ钢，仅用了 ８年就?
Trucks that transport coal or iron ore are subject to rapid deterioration due to corrosion and abrasive wear. Carbon steel bodies may need to be repaired in less than 4 years and their service life rarely exceeds 16 to 20 years. In South Africa, Spoornet operates a coal car on the Richards Bay coal export route in just 8 years as part of its bodywork in No. 8 mild steel and Corten A steel.