铝制换热器耐腐蚀性测试标准与研究综述

Review on Corrosion Resistance Test standard and Research of Aluminum Heat Exchanger

针对铝制换热器耐腐蚀性测试标准和测试技术进行综述,发现当前国内外耐腐蚀性测试标准中应用的试验方法主要为盐雾试验,而各标准对铝制换热器的测试存在一定差异和局限性。调研发现各文献针对铝制换热器使用NSS和SWAAT试验占比分别为40%和28%;使用电镜扫描和性能测试的评价方式占比分别为38%和23%。调研中国雨水状况结合部分文献推断:对于房间空调器用铝制换热器而言,以PH值为4.5~5.5之间的盐雾环境与干燥静置按时间比1:2交替运行的方式进行试验较为合理。

This paper summarizes the corrosion resistance test standards and test technologies of aluminum heat exchangers.It is found that the test method used in the current corrosion resistance test standards at home and abroad is mainly salt spray test,and there are some differences and limitations in the test of aluminum heat exchangers in various standards.It is found that NSS and SWAAT test accounts for 40%and 28%respectively for aluminum heat exchangers;The evaluation methods of scanning electron microscope and performance test accounted for 38%and 23%respectively.Based on the investigation of China's rainwater situation and some literature,it is inferred that for the aluminum heat exchanger for room air conditioner,it is reasonable to conduct the test in the salt spray environment with PH value between 4.5~5.5 and dry standing in the mode of alternating operation with time ratio of 1:2.