1.1 本指南涵盖了一种评估方法，旨在为化学加工行业提供锻铁和镍基合金腐蚀性能的信息。本指南包含了在各种环境中进行一般腐蚀测量的试验条件、氯化物环境中的缝隙腐蚀阻力和氯化物环境中应力腐蚀开裂阻力。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。 本标准的使用者有责任制定适当的安全、健康和环境实践，并在使用前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》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 本指南旨在提供一系列评估，帮助处理化学环境的工程师选择合适的合金( 1. 3. ). 在化学环境中，确定一般耐腐蚀性的一个重要问题是合金从低速率腐蚀转变为高速率腐蚀的温度。其他重要问题包括缝隙腐蚀和抗应力腐蚀开裂的趋势，特别是在含氯化物的热水环境中。 4.2 本指南也适用于合金开发者，以帮助他们选择化学加工行业特别感兴趣的环境和测试方法。 4.3 这种方法的使用将允许在不同供应商的合金之间进行直接比较，从而帮助工程师选择最合适的材料进行进一步测试，以确定其应用的适用性。

1.1 This guide covers an evaluation approach that is designed to provide information on the corrosion properties of wrought iron- and nickel-based alloys for the chemical process industries. This guide incorporates test conditions for general corrosion measurements in a variety of environments, crevice corrosion resistance in chloride environments, and stress corrosion cracking resistance in chloride environments. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 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 the user of this standard to establish appropriate safety, health, and environmental practices and to 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 ====== 4.1 This guide is intended to provide a series of evaluations that will assist engineers dealing with chemical environments in selecting appropriate alloys ( 1- 3 ). In chemical environments, an important issue for determining general corrosion resistance is the temperature at which an alloy transitions from corrosion at a low rate to corrosion at a much higher rate. Other important concerns include the tendency towards crevice corrosion and stress corrosion cracking resistance, especially in hot chloride-containing aqueous environments. 4.2 This guide is also intended for alloy developers to assist them in choosing environments and test methods that are of particular interest to the chemical process industries. 4.3 The use of this approach will allow direct comparisons to be made among alloys from various suppliers and, thereby, to assist engineers in selecting the most appropriate materials for further testing to determine suitability in their application.