1.1 这些试验方法涵盖了确定化学外加剂对混凝土中金属腐蚀影响的程序。这些试验方法可用于评估旨在抑制混凝土中钢的氯离子腐蚀的材料。它也可用于评估外加剂在氯化物环境中的腐蚀性。 1.2 以国际单位制表示的数值应视为标准。国际单位制后括号中给出的值仅供参考，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）。本标准的使用者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。 1.4 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====== 3.1 这些试验方法为预测混凝土中使用的外加剂的抑制或腐蚀性能提供了可靠的方法。 3.2 计算总积分（库仑）电流，以提供由于宏电池腐蚀而发生的腐蚀的指示。 3.3 这些试验方法有助于混凝土中使用的缓蚀剂的开发研究。 3.4 这些试验方法已在其他地方使用，通过这些试验方法测量的腐蚀与嵌入钢的腐蚀损伤之间具有良好的一致性( 1个- 4. )。 4. 这些试验方法可能无法对不同缓蚀剂的性能进行适当的排序，尤其是在钢筋覆盖层小于40 mm（1.5 in.）或水灰比大于0.45的情况下。混凝土混合料的比例和钢覆盖层的选择是为了加速氯化物的进入。一些抑制剂可能会对这一过程产生影响，这可能会导致与实际使用中预期的结果不同的结果( 5. )。

1.1 These test methods cover a procedure for determining the effects of chemical admixtures on the corrosion of metals in concrete. These test methods can be used to evaluate materials intended to inhibit chloride-induced corrosion of steel in concrete. It can also be used to evaluate the corrosivity of admixtures in a chloride environment. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units 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 the user of this standard to 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 These test methods provide a reliable means for predicting the inhibiting or corrosive properties of admixtures to be used in concrete. 3.2 The total integrated (coulombs) current is calculated to provide an indication of the corrosion that occurs due to the macrocell corrosion. 3.3 These test methods are useful for development studies of corrosion inhibitors to be used in concrete. 3.4 These test methods have been used elsewhere with good agreement between corrosion as measured by these test methods and corrosion damage on the embedded steel ( 1- 4 ). 4 These test methods might not properly rank the performance of different corrosion inhibitors, especially at concrete covers over the steel less than 40 mm (1.5 in.) or water-to-cement ratios above 0.45. The concrete mixture proportions and cover over the steel are chosen to accelerate chloride ingress. Some inhibitors might have an effect on this process, which could lead to results that would differ from what would be expected in actual use ( 5 ).