_202411 评估冷却液系统软管和材料耐电化性的试验方法

[中文适用范围]： 本测试方法提供了一种评估汽车冷却系统软管及材料电化学电阻的标准程序。电化学降解已被确定为 EPDM 冷却系统软管失效的主要原因。该测试方法包括一个 procedure，该 procedure 对暴露在 水/冷却剂溶液中的测试样品施加电压。方法#1，称为“Brabolyzer"测试，是一种整体软管测试。方法#2，称为 U 形管测试，使用硫化板样品或从软管中取出的管子材料制备的板（方法#2仅作为筛选测试）。除本 SAE 推荐规范中规定的任何测试参数外，其他参数应由测试人员和申请人协商确定。 [外文原描述]： This test method provides a standardized procedure for evaluating the electrochemical resistance of automotive coolant hose and materials. Electrochemical degradation has been determined to be a major cause of EPDM coolant system hose failures. The test method consists of a procedure which induces voltage to a test specimen while it is exposed to a water/coolant solution. Method #1, referred to as a “Brabolyzer” test, is a whole hose test. Method #2, referred to as a “U” tube test, uses cured plate samples or plates prepared from tube material removed from hose (Method No. 2 is intended as a screening test only). Any test parameters other than those specified in this SAE Recommended Practice, are to be agreed to by the tester and the requester.