金属和合金的腐蚀.通过嵌入盐、灰或其他固体对金属材料进行高温腐蚀试验的试验方法

[中文适用范围]： 本标准规定了金属材料高温腐蚀试验的方法，通过将其嵌入由盐、灰和/或其他固体组成的腐蚀性粉末中，并在受控气体环境中暴露于高温来评价其耐腐蚀性能。 存在两种选择：完全嵌入和部分嵌入。 完全嵌入用于需要测量质量变化的情况。 部分嵌入用于研究单个测试件上三个潜在不同的相互作用区域，即嵌入部分、非嵌入部分和气体/粉末界面区域。 因此，重量测量是不合适的，而是需要金相研究。 本国际标准不包括将试件浸入液体中的方法或在试件上施加表面沉积物的情况。 这些方法包含在 ISO 17245 和 [外文原描述]： ISO 17248:2015 specifies the method for high temperature corrosion testing of metallic materials by embedding in a corrosive powder made up of salt, ash, and/or other solids and exposing them to high temperature in a controlled gas environment to evaluate their corrosion resistance. Two options exist: fully embedding and partially embedding. Fully embedding is used in cases in which a mass change measurement is required. Partially embedding is used to investigate three potentially different interaction zones on a single test piece, i.e. the embedded part, the non-embedded part, and the gas/powder interface region. Therefore, gravimetric measurements are not appropriate and metallographic investigations are necessary instead. ISO 17248:2015 does not cover methods where test pieces are immersed in a liquid or cases in which a surface deposit is applied to the test pieces. These methods are covered in ISO 17245 and ISO 17224, respectively.