The stress corrosion cracking(SCC)behavior of X70 steel welded joint was investigated in a near-neutral pH solution by fluctuant slow strain rate test(F-SSRT).
分析温度、应力（应变）和慢应变率等因素对极化曲线的影响，并讨论温度、应力和慢应变率对管道钢发生应力腐蚀开裂的驱动作用。
In here, in solution you have all these molecules of solvent, molecules of salt, molecules of acid, or whatever, pH that are going to be around to buffer the pH.
在这里，溶液里包含了所有这些溶剂分子，盐分子酸分子和其它东西，可以用来缓冲。
Slow granule: can make solution PH value in a certain range of constant maintain the basic material.
缓冲剂：能够使溶液PH值在一定范围内维持基本恒定的物质。
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