ISO 12732:2006 金属与合金的腐蚀 采用双回路法测定电化学活性（基于Cihal法）

标准编号：ISO 12732:2006

中文名称：金属与合金的腐蚀 采用双回路法测定电化学活性（基于Cihal法）

英文名称：Corrosion of metals and alloys — Electrochemical potentiokinetic reactivation measurement using the double loop method (based on Cihal's method)

发布日期：2006-09

标准范围

ISO 12732:2006规定了使用双回路电化学动电位再活化（DL-EPR）试验（基于Cihal的方法）测量不锈钢和镍基合金的敏化度（DOS）的方法。该方法可用于定量评估导致在晶界或基体中形成合金元素贫化区的有害热效应。然而，在测试受热影响的焊缝区域时，应注意，因为沿熔合线的敏化区可能分布不均匀。试验结果可作为识别不锈钢和镍基合金对晶间腐蚀、点蚀和晶间应力腐蚀开裂的潜在敏感性的指标，但这些腐蚀模式的预测取决于补充的特定试验。ISO 12732:2006描述了一般方法，并举例说明了特定合金的合适试验暴露条件。

ISO 12732:2006 specifies the method for measuring the degree of sensitization (DOS) in stainless steel and nickel-based alloys using the Double Loop Electrochemical Potentiokinetic Reactivation (DL-EPR) test (based on Cihal's method).The method may be used for the quantitative assessment of deleterious thermal effects resulting in the formation of alloy-element-depleted zones at grain boundaries or in the matrix. However, attention should be paid when testing heat-affected weld zones, due to possible non-uniform distribution of sensitized zones along the fusion lines.The results of the test can be used as an index to identify the potential susceptibility of stainless steel and nickel-based alloys to intergranular corrosion, pitting corrosion, and intergranular-stress corrosion cracking, but prediction of these corrosion modes depends on complementary specific testing.ISO 12732:2006 describes the general methodology and gives examples of suitable test exposure conditions for specific alloys.

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