金属与合金的腐蚀. 液体中不锈钢和镍基合金均匀腐蚀速率的测定方法

[中文适用范围]： 本国际标准规定了不锈钢和镍基合金在预期液体中均匀腐蚀的腐蚀速率的测量以及材料活化后钝化的能力。 该方法旨在用于估计特定环境条件下化学工业在大气条件下液体中的均匀腐蚀速率，而不是作为资格测试。 它还可用于确定等腐蚀图以及腐蚀速率超过 0.1 mm/a 的温度。 本国际标准不适用于超过 1 毫米/年的过度腐蚀速率，因为更高的腐蚀速率表明不锈钢不适合该应用。 本国际标准不适用于含有卤化物（尤其是氯化物）的溶液，因为这些溶液可能会导致局部腐蚀。 [外文原描述]： ISO 18069:2015 specifies the measurements of the corrosion rate of uniform corrosion for stainless steels and nickel based alloys in the intended liquids and the ability for the material to passivate after activation. This method is intended to be used for estimation of the uniform corrosion rate in liquids, under atmospheric conditions, for the chemical industry under specific environmental conditions and not as a qualification test. It can also be used to determine iso-corrosion diagrams and at which temperature the corrosion rate exceeds 0,1 mm/a. ISO 18069:2015 is not intended for excessive corrosion rates above 1 mm/a since an even higher corrosion rate indicates that the stainless steel is not suitable in the application. Nor is it intended to be used for solutions containing halides, especially chlorides, since these might cause localized corrosion.