GB/T 19292.2-2003 in English

《GB/T 19292.2-2003金属和合金的腐蚀 大气腐蚀性 腐蚀等级的指导值》由TC183（全国钢标准化技术委员会）归口，TC183SC11（全国钢标准化技术委员会金属和合金的腐蚀分会）执行，主管部门为中国钢铁工业协会。
本标准规定了在GB／T19292．1，中定义的腐蚀性等级的腐蚀特征和指导值。指导值给出了标准结构材料的腐蚀速率，并且这些值可用于工程计算。指导值规定了标准金属每个腐蚀性等级的技术内容。本标准可以用于预测在不同腐蚀性等级的大气中，金属、合金和一些金属涂镀层的使用寿命。这些指导值也为确定是否需要保护措施和其他工程用途提供了技术依据。指导值是基于大量现场暴晒和使用结果中获得的。对在可导致局部或电化学腐蚀的特定位置附近，其腐蚀速率可能会超出特定的腐蚀性等级预期的值。

Scope

This standard specifies the corrosion characteristics and guidance values for the corrosiveness levels defined in GB/T 19292.1. Guideline values give the corrosion rates for standard materials of construction and these values can be used in engineering calculations. Guideline values specify the technical content of each corrosivity class of standard metals. This standard can be used to predict the service life of metals, alloys and some metal coatings in atmospheres of different levels of corrosiveness. These guideline values also provide a technical basis for determining the need for protective measures and other engineering purposes. Guidance values are based on extensive field exposure and use results. Corrosion rates may exceed those expected for a particular class of corrosivity in the vicinity of a particular location where localized or galvanic corrosion may result.