目前,选择保护钢管外壁防腐涂层类型的可能范围有了明显扩大。本文着重指的是那些对于地下管道来说五十年而对海洋管道二十五年保证其不停工作的防腐涂层类型进行调查的结果表明,尽管最近十年出现了一系列塑料防腐层,但是煤焦油瓷漆仍然是最受欢迎的一种保护涂层,它可以成功地被用于任何口径的管道。近 At present, the scope of the selection of the type of anti-corrosion coating of steel pipe wall has been significantly expanded. This article focuses on the findings of a survey of the type of anti-corrosion coating that has been conducted on underground pipelines for fifty years and that the marine pipelines have kept on working for twenty-five years. It shows that despite the emergence of a series of plastic coating over the last ten years, However, coal tar enamel is still the most popular type of protective coating that can be successfully used in any size pipe. near