ISO 3651-2:1998(E)
Determination of resistance to intergranular corrosion of stainless steels—
ISO 3651-2不锈钢耐晶间腐蚀的测定--
part 2:
Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels—
.第2部分:
铁素体、奥氏体和铁素体-奥氏体(二重)不锈钢--.
Corrosion test in media containing sulfuric acid
含有硫酸的介质中的腐蚀.
工艺品有哪些
1 scope
This part of ISO 3651 specifies methods for the determination of the resistance to intergranular corrosion of ferritic, austenitic and ferritic-austenitic (duplex) stainless steels in media containing sulfuric acid. It also specifies the purpos which may be assigned to the test. The test methods included are:
本标准规定了铁素体、奥氏体和铁素体-奥氏体（二重）不锈钢在含硫酸的介质中的耐晶间腐蚀测定的方法。也规定了 分别测试的目的。测试方法包括：
⏹method A: the 16% sulfuric acid/copper sulfate test (monypenny Strauss test);
⏹method B: the 35% sulfuric acid/copper sulfate test;
⏹method C: the 40% sulfuric acid/ferric sulfate test.
方法A：16% 硫酸 或硫酸铜 测试（Monypenny Strauss试验你们好吗）
方法B：35% 硫酸 或硫酸铜 测试
方法C：40% 硫酸 或硫酸铁 测试
The methods are applicable to stainless steels supplied in the form of cast, rolled or forged products and tubes and intended for u in a mildly oxidizing acid medium (for example, sulfuric acid, phosphoric acid).
Unless specified in the product standard, the method to be ud, A, B or C, shall form the subject of an agreement between the interested parties.
该方法适用于以铸造、卷制、锻打型式提供的产品和管状和预期用于微氧化酸介质（例：硫酸、磷酸）
Annex A gives examples of application of the three methods on stainless steels.
附录A 给出了适用于三个方法的不锈钢的例子
Note—it is important to note that the result of the corrosion test is only strictly valid for the corrosive medium ud in the test. It constitutes a basis for estimation the resistance to intergranular corrosion but may not be ud to check resistance to other forms of corrosion (general corrosion, pitting, stress corrosion, etc.). it is necessary for the ur to
adapt the specified corrosion test to the u which will be made of the alloy. The test should, in no ca, be considered as an absolute criterion of the quality of the metal.
注： 注意腐蚀性能测试的结果只是对测试中使用的腐蚀介质而言，这一点是重要的。它的构成基于对耐晶间腐蚀的评估，但不能用于检查其他型式的耐腐蚀性能（一般腐蚀、氢气泡疤、超应力引起的腐蚀等）。使用者需选用适合的腐蚀测试方法用于合金材料。这些测试 。
2 purpo of the test 测试目的
This intergranular corrosion test may have either of the purpos given in 2.1 and 2.2.
晶间腐蚀测试可有2。1和2。2所列的目的之一：
2.1 verification of the intrinsic resistance of the steel to intergranular corrosion
2．1 证明钢的耐晶间腐蚀性能
恐怖电影排行榜前十名世界排名This verification applies only to low carbon steels (C≤0.03%) and stabilized steels specifi
ed for resistance to intergranular corrosion. The metal is inspected after having undergone a heat treatment for nsitization which can be a heat treatment or welding for nsitization (e clau3).
该证明仅适用于低碳钢（C≤0.03%）和耐晶间腐蚀性能稳定的钢。金属在经受促进感光强度的热处理或焊接后检查。
2.2 inspection of the efficiency of the solution treatment
2．2 检查固溶退火的效能黄齐帆
This inspection is only carried out on thin products for which the cooling speed may be made sufficiently rapid. It is only of interest for the steels which are not defined in 2.1. the metal is inspected in the state in which it is delivered to the ur, without heat treatment for nsitization.
该检查只有薄的能快速完全冷却的产品能实现。仅在2。1不能确定时感兴趣。该金属在递交给用户的状态下检查，不做促感光强度热处理。
3nsitization treatment
促进感受性处理
nsitization heat treatment
促进感受性热处理
In order to verify the intrinsic resistance to intergranular corrosion (e 2.1), it is necessary to carry out a heat treatment for nsitization for stabilized steels and steels with low carbon conten.
为了要查证对品牌窗帘 intergranular 本质的抗拒腐蚀 (见到 2.1), 它对实行一个热处理而言是必需的为促进感受性为稳定钢和钢与低点碳 conten。
The nsitization heat treatment can be:
促进感受性热处理能是:
青春的日子T1: heating the specimen at 700℃±10℃ for 30 minutes followed by water cooling;
暖气在宁字五行属什么 30 分钟的 700 ℃± 10℃的样品跟随被水冷却;
T2: heating the specimen at 65朦胧的读音0℃±10℃ for 30 minutes followed by water cooling.
暖气在 30 分钟的 650 ℃± 10℃的样品跟随被水冷却。
The above defined treatments only apply to austenitic and duplex steels.
The type of nsitization heat treatment shall be defined in the product standard or in the order. If not specified, heat treatment T1 shall be applied.
Sensitization by welding
Sensitization by the preparation of welded test pieces may be ud as an alternative to 3.1, by agreement between the interested parties. Test pieces which are not solution annealed after welding shall be tested in the as-welded condition. No additional nsitization heat treatment shall be performed.
Sensitization by welding applies to all the stainless steels covered by this part of ISO 365
1.
4Corrosion test
principle
A test piece, prepared as specified in 4.2 and 4.3, is immerd in a solution according to method A, B or C for a specified time. The test piece is then subjected to a bend test. The convex surface to the test piece is examined after bending in order to reveal any cracks caud by intergranular corrosion.
For small diameter tubes, up to 60 mm (tube diameter shall be compatible with the aperture of the flask containing the solution), a flattening test is ud instead of the bend test.
