ISO 21610:2009规定了测定奥氏体不锈钢晶间腐蚀敏感性的加速方法。标准规定的方法提供的结果与使用ISO 3651时获得的结果相同？1和ISO 3651？2，但加速腐蚀试验的试验周期较短。 该标准适用于各种金属生产的检测，包括两层轧制金属、焊接接头、熔敷金属和焊缝金属。 规定了两种试验方法: 方法A:在硫酸铜和浓硫酸溶液中，在金属铜存在下的腐蚀试验； 方法B:在金属铜存在下，在硫酸铜、硫酸和氟化铜的溶液中进行腐蚀试验。

ISO 21610:2009 specifies accelerated methods for the determination of the intergranular corrosion susceptibility of austenitic stainless steels. The methods specified by the standard provide results identical to those obtained when using ISO 3651？1 and ISO 3651？2, but the test period for the accelerated corrosion test is shorter. The standard is applicable to the testing of various kinds of metal production, including two-layer rolled metal, welded joints, deposited metal and weld seam metal. Two test methods are specified:

• method A: corrosion test in a solution of copper sulfate and concentrated sulfuric acid in the presence of metallic copper;
• method B: corrosion test in a solution of copper sulfate, sulfuric acid and copper fluoride in the presence of metallic copper.