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1 前言 积累材料在各种大气环境中的腐蚀数据,弄清我国各种典型气候环境的大气腐蚀性,是为国家经济建设和国防建设提供基础数据的一项非常重要的工作。 大气腐蚀性可以由典型金属在大气环境中所产生的腐蚀效应来确定,也可由造成腐蚀的环境因素的严酷程度来规定。一定组成状态的材料在腐蚀性相对稳定的大气环境中其腐蚀程度是比较稳定的,并有相当程度的重现性。因而国际上常用锌和钢等典型金属在各种大气环境中的腐蚀速率,来表示这些环境的大气腐蚀性及其等级。
1 INTRODUCTION Accumulating corrosive data of materials in various atmospheric environments and understanding the atmospheric corrosivity of various typical climatic environments in our country is a very important task for providing basic data for the country’s economic construction and national defense. Atmospheric corrosivity can be determined by the corrosive effects of typical metals in the atmosphere, as well as by the severity of the environmental factors that cause corrosion. A certain composition of the material in the corrosive atmosphere is relatively stable, its corrosion is relatively stable, and a considerable degree of reproducibility. Therefore, the corrosion rate of typical metals, such as zinc and steel, in various atmospheric environments is commonly used internationally to represent the atmospheric corrosivity and grade of these environments.