1.1 本规程涵盖并定义了金属和合金暴露于天气的条件。它规定了在任何大气试验中应遵循的一般程序。本标准旨在帮助进行大气腐蚀试验，以避免此类试验中的一些陷阱。因此，它主要关注面板风险，以获取数据进行比较。 1.2 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。使用本标准的人有责任在使用前咨询并建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 3.1 本文所述程序可用于评估金属在暴露于天气时的耐腐蚀性，以及评估特定位置大气的相对腐蚀性。由于天气影响的可变性和复杂性以及影响试验场地大气腐蚀性的工业和自然因素，应考虑多年暴露期，以尽量减少其影响。此外，由于现场的腐蚀性可能因季节而异，因此应在一年中的同一时间进行暴露，以尽量减少可变性，或者应通过多次暴露来确定这些差异。 3.2 风化试验中应始终使用对照样品。对照样品应来自具有既定风化特征的材料。应为对照试样积累大量腐蚀数据。保留暴露在外的所有材料的样品也是一种良好的做法，以便可以测量长期老化的可能影响。

1.1 This practice covers and defines conditions for exposure of metals and alloys to the weather. It sets forth the general procedures that should be followed in any atmospheric test. It is presented as an aid in conducting atmospheric corrosion tests so that some of the pitfalls of such testing may be avoided. As such, it is concerned mainly with panel exposures to obtain data for comparison purposes. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 3.1 The procedures described herein can be used to evaluate the corrosion resistance of metals when exposed to the weather, as well as to evaluate the relative corrosivity of the atmosphere at specific locations. Because of the variability and complexity of weather effects and the industrial and natural factors influencing the atmospheric corrosivity of a test site, a multi-year exposure period should be considered to minimize their influence. Also, as corrosivity may vary at a site from season to season, exposures should be made either at the same time of the year to minimize variability or these differences should be established by multiple exposures. 3.2 Control specimens should always be employed in weathering tests. The control specimens should be from a material having established weathering characteristics. A substantial amount of corrosion data shall have been accumulated for the control specimens. It is also good practice to retain samples of all materials exposed so that possible effects of long-term aging can be measured.