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焊缝接头的晶间腐蚀,是浓硝酸生产中铝制设备很快破坏的主要原因。评定铝焊缝接头的晶间腐蚀倾向的方法有数种。最广泛采用的是:在50％硝酸中的试验法(耐腐蚀准数
Intergranular corrosion of weld joints is the main reason for the rapid destruction of aluminum equipment in concentrated nitric acid production. There are several ways to evaluate the tendency of intergranular corrosion in aluminum welded joints. The most widely used is: 50% nitric acid in the test method (standard corrosion resistance