ISO 9225:2012规定了测量用于ISO 9223大气腐蚀性分类的腐蚀性估算所需参数的方法。 ISO 9225:2012规定了环境参数的测量方法，用于基于计算的标准金属第一年腐蚀速率的规范性腐蚀性估计，以及基于暴露环境特征的信息性腐蚀性估计。 它没有描述测量参数的常用分析技术，因为这取决于实验室中使用的可用分析技术。给出了SO2和Cl-沉积速率沉积测量的具体方法和不同测量方法比较的换算系数。

ISO 9225:2012 specifies methods for measuring the parameters needed for corrosivity estimation used for classification of the corrosivity of atmospheres in ISO 9223. ISO 9225:2012 specifies methods for the measurement of environmental parameters for normative corrosivity estimation based on calculated first-year corrosion rates of standard metals, and informative corrosivity estimation based on characterization of the exposure environment. It does not describe the usual analytical techniques for the measured parameters since this depends on the available analytical techniques used in laboratories. Specific methods for deposition measurement of SO₂ and Cl^- deposition rates and conversional factors for comparison of different measuring methods are given.