分析了PV8505调压阀产生严重冲刷腐蚀而失效的原因，并提出了相应的改造措施。
The causes of failure of pressure control valve PV8505 resulted from erosion corrosion were analyzed and modification measures were presented.
水流及河流控制工程对加速河道冲刷有严重影响。
Stream and river control works may have a serious local influence on accelerating channel erosion.
随着试验周期的延长，表面产生了腐蚀产物，这时冲刷作用对试样表面腐蚀产物膜的破坏更加严重，所以冲刷腐蚀速率比浸泡腐蚀速率增加。
Along the experiment time was prolonged, the corrosion products was appeared on the surface of sample. Then the runoff effect became more aggravated, so the dynamic corrosion rate was elevated.
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