东风_4型机车铜热交换元件的清洗

Washing of copper heat exchange elements for DF_4 locomotives

对东风４ 型机车铜热交换元件的故障情况进行了统计分析，指出其危害性。介绍了改进后的清洗工艺流程、各清洗箱溶液配方、清洗时间等；清洗工艺的改进，取得了良好的社会效益和经济效益。

The statistical analysis of failures of copper heat exchange elements for DF 4 locomotives was conducted.The harms of failures were pointed out.The washing process,preparation of solution for each washing tank and washing time after improvement were presented.social and economic benefits were achieved by improving the washing technology. \ \