Compared with the peak-aged alloy, the over-aged alloy contains more equilibrium phases at the grain boundaries and wider PFZ, and thus suffers from faster intergranular and exfoliation corrosion.

 
  • 过时效状态与峰时效状态相比, 晶界平衡相增多, 无析出带变宽, 晶间腐蚀及剥落腐蚀程度将更加严重。
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