当评估特定涂层系统、基材、工艺和设计的综合腐蚀和疲劳性能时，应使用本实验室测试程序。该试验旨在对拟用螺旋弹簧设计与现有现场验证螺旋弹簧在受到腐蚀和疲劳综合影响时进行A到B比较。本试验涵盖的腐蚀机制包括一般腐蚀、表面腐蚀和点蚀。疲劳试验包括螺旋弹簧设计的最大设计应力和/或应力范围（通常定义为车辆从振动位置到回弹位置的偏移）。通过在疲劳试验之前对弹簧进行预处理，模拟砾石和热量的影响。与时间相关的腐蚀机制，如应力腐蚀开裂，本试验不涉及。

This lab test procedure should be used when evaluating the combined corrosion and fatigue performance for a particular coating system, substrate, process and design. The test is intended to provide an A to B comparison of a proposed coil spring design versus an existing field validated coil spring when subjected to the combined effects of corrosion and fatigue. The corrosion mechanisms covered by this test include general, cosmetic and pitting corrosion. Fatigue testing covers the maximum design stress and/or stress range of the coil spring design (typically defined as excursion from jounce to rebound positions in a vehicle). The effects of gravel and heat are simulated by pre-conditioning the springs prior to fatigue testing. Time dependant corrosion mechanisms such as stress corrosion cracking are not addressed with this test.