AASHTO T 373M/T 373-17（2021）描述了评估无涂层耐腐蚀钢筋（CRR）M 334M/M 334合金钢筋与M 31M/M 31或其他选定参考钢筋的腐蚀性能的程序，在各种试验溶液中使用电化学极化电阻和动电位极化测量。试验方法评估了未涂层CRR棒的腐蚀性能，其与（1）环境pH值和（2）氯离子浓度，尤其是[Cl？]/[哦？]阈值比率。

AASHTO T 373M/T 373-17 (2021) describes procedures to evaluate the comparative qualitative corrosion performance of uncoated Corrosion Resistant Reinforcing (CRR) M 334M/M 334 alloy steel bars to those of M 31M/M 31 or other selected reference bars, utilizing electrochemical polarization resistance and potentiodynamic polarization measurements in various test solutions. The test methods evaluate the corrosion performance of the uncoated CRR bars as a function of (1) pH of the environment and (2) concentration of chloride ions, in particular the [Cl?]/[OH?] threshold ratio.