Water vapor aging test whether experiment: discoloration or corrosion, and the subsequent spots solderability.
水蒸气老化实验：测试是否变色或腐蚀斑点，及后续的可焊性。
2
Use of VCI Paper (Volatile Corrosion Inhibitor) / VPI (Vapor Phase
使用VCI纸（侵蚀抑制剂）和VPI（蒸汽抑制剂）
3
In addition, for corrosion reducing and retarding, it is necessary to use steam directly to heat contactor to remove acidic vapor and to lead acidic vapor into gas system.