1.1 本规程提供了一种使用电化学技术评估金属中氢吸收、渗透和传输的程序，该技术由Devanathan和Stachurski开发。 2. 虽然本规程主要用于实验室，但此类测量已在现场或工厂应用中进行。因此，通过适当的调整，这种做法也可以适用于此类情况。 1.2 本规程描述了氢原子在金属中有效扩散率的计算，以及用于区分可逆和不可逆俘获。 1.3 本规程规定了基于稳态氢通量评估金属吸氢量的方法。 1.4 本规程提供了样本制备、环境变量控制和监测、测试程序以及可能的结果分析的指导。 1.5 原则上，该实践可适用于对氢具有高溶解度且氢渗透可测量的所有金属和合金。 该方法可用于根据暴露金属的吸氢量对不同环境的相对侵蚀性进行排序。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 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====== 5.1 本文所述程序可用于评估暴露于腐蚀环境或阴极极化产生的材料充氢的严重性。 它还可用于确定材料在氢扩散方面的基本特性（例如，氢的扩散率）以及冶金、加工和环境变量对氢在金属中扩散的影响。 5.2 从氢渗透试验中获得的数据可以与氢脆或氢致开裂相关的其他试验相结合，以确定发生开裂的材料中氢通量或氢含量的临界水平。

1.1 This practice gives a procedure for the evaluation of hydrogen uptake, permeation, and transport in metals using an electrochemical technique which was developed by Devanathan and Stachurski. 2 While this practice is primarily intended for laboratory use, such measurements have been conducted in field or plant applications. Therefore, with proper adaptations, this practice can also be applied to such situations. 1.2 This practice describes calculation of an effective diffusivity of hydrogen atoms in a metal and for distinguishing reversible and irreversible trapping. 1.3 This practice specifies the method for evaluating hydrogen uptake in metals based on the steady-state hydrogen flux. 1.4 This practice gives guidance on preparation of specimens, control and monitoring of the environmental variables, test procedures, and possible analyses of results. 1.5 This practice can be applied in principle to all metals and alloys which have a high solubility for hydrogen, and for which the hydrogen permeation is measurable. This method can be used to rank the relative aggressivity of different environments in terms of the hydrogen uptake of the exposed metal. 1.6 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 determine the applicability of regulatory limitations prior to use. 1.7 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 ====== 5.1 The procedures described, herein, can be used to evaluate the severity of hydrogen charging of a material produced by exposure to corrosive environments or by cathodic polarization. It can also be used to determine fundamental properties of materials in terms of hydrogen diffusion (for example, diffusivity of hydrogen) and the effects of metallurgical, processing, and environmental variables on diffusion of hydrogen in metals. 5.2 The data obtained from hydrogen permeation tests can be combined with other tests related to hydrogen embrittlement or hydrogen induced cracking to ascertain critical levels of hydrogen flux or hydrogen content in the material for cracking to occur.