ASTM G48-11中三氯化铁点蚀试验的技术要点

Technical Essentials of Pitting Corrosion Test of Ferric Chloride in ASTM G48-11

三氯化铁点蚀试验主要用于评定耐蚀合金的耐点蚀性能,对ASTM G48-11中的三氯化铁点蚀试验进行了解析,从试验设备、试验溶液、试样制备和试验方法等方面介绍了三氯化铁点蚀试验的技术要点和实践经验。结果表明:进行耐蚀合金焊接接头三氯化铁点蚀试验时,在溶液配制、试样表面处理、试样放置时间节点等细节上会存在一定的误区,将影响试验结果的准确性;在日常检验工作中,应强化试验细节的合规性,不断提高试验结果的准确性,为企业生产提供可靠的试验数据。

The pitting corrosion test of ferric chloride is mainly used to evaluate the pitting corrosion resistance of corrosion resistant alloys.The pitting corrosion test of ferric chloride in ASTM G48-11 was analyzed.The technical points and practical experiences of pitting corrosion test of ferric chloride were introduced from the aspects of test equipments,test solutions,sample preparation and test methods.The results show that there could be some errors in the details of solution preparation,sample surface treatment,sample placement time node and so on during the pitting corrosion test of ferric chloride for corrosion resistant alloy welded joints,and which would affect the accuracy of the test results.In daily inspection work,the regularity of test details should be strengthened,the accuracy of test results should be continuously improved,and reliable test data should be provided for enterprise production.