标准摘要
[中文适用范围]： 本文件涉及钢构件所处的主要环境的分类以及这些环境的腐蚀性。本文件 — 根据标准试样的质量损失（或厚度损失）定义了大气腐蚀类别，并描述了钢构件通常会接触到的典型自然大气环境，给出腐蚀性估算的建议； — 描述了结构浸入水或埋入土壤的不同环境类别； — 提供了一些特殊腐蚀应力的信息，这些应力可能会导致腐蚀速率显著增加或对防护涂层系统提出更高的要求。与特定环境或腐蚀类别相关的腐蚀应力是决定防护涂层系统选择的一个基本参数。 [外文原描述]： ISO 12944-2:2017 deals with the classification of the principal environments to which steel structures are exposed, and the corrosivity of these environments. ISO 12944-2:2017 - defines atmospheric-corrosivity categories, based on mass loss (or thickness loss) by standard specimens, and describes typical natural atmospheric environments to which steel structures are exposed, giving advice on the estimation of the corrosivity, - describes different categories of environment for structures immersed in water or buried in soil, and - gives information on some special corrosion stresses that can cause a significant increase in corrosion rate or place higher demands on the performance of the protective paint system. The corrosion stresses associated with a particular environment or corrosivity category represent one essential parameter governing the selection of protective paint systems.
英文名称Paints and varnishes — Corrosion protection of steel structures by protective paint systems — Part 2: Classification of environments