本文件规定了一种使用双电极系统测量铝和铝合金在质量分数为5%的氯化钠溶液中的点蚀电位的试验方法，其中固定浓度的乙酸作为氧化剂。本文件提供了一种对铝合金进行评级的简单方法，特别适用于评估薄包层材料的电流保护性能，因为该测试方法几乎不会造成试样损坏。

This document specifies a test method for the measurement of the pitting potential of aluminium and aluminium alloys in sodium chloride solution of a mass fraction of 5 %, with a fixed concentration of acetic acid as the oxidant, using a two-electrode system. This document provides a simple method for ranking aluminium alloys and is especially useful for evaluating galvanic protection performance of thin clad materials because the test method causes little specimen damage.