应用悬臂梁往复弯曲腐蚀疲劳试验机对石油、电站等行业常用的高强钢25Cr2Ni4MoV在空气和盐酸介质中的腐蚀疲劳行为进行了研究,探讨了循环应力和盐酸浓度对腐蚀疲劳的影响.结果表明,25Cr2Ni4MoV钢在盐酸介质中存在腐蚀疲劳现象,且循环应力越大,盐酸浓度越高,其腐蚀疲劳寿命越低,应力对其寿命的影响较盐酸浓度的影响更显著；在一定浓度范围内,盐酸浓度变化对寿命影响较小.断口形貌表明,其裂纹扩展方式为沿晶扩展.
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