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研究了环氧沥青基有机涂层对１６Ｍｎ钢腐蚀疲劳（ＣＦ）行为的影响．在恒幅疲劳载荷控制下比较了裸样与涂层试样在空气、自然海水及不同阴极保护条件下的寿命变化规律．测量了试样在海水中ＣＦ过程自腐蚀电位随循环周次的变化，在不同阴极保护条件下记录了阴极电流随循环周次的变化情况．结果表明，虽然在海水中环氧沥青基有机涂层明显地提高了１６Ｍｎ钢的ＣＦ寿命，但涂层作用机理并非只是简单的介质隔离作用．在不同阴极保护条件下，有涂层试样和无涂层试样表现出了不同的规律，这意味着两者的腐蚀疲劳存在不同的作用机制．海水中的Ｃａ、Ｍｇ离子对无涂层试样的ＣＦ寿命起着重要的作用，而对有涂层试样的影响则很小．
The effects of epoxy asphalt based organic coatings on corrosion fatigue (CF) behavior of 16Mn steel were investigated. Under the control of constant amplitude fatigue load, the life span of bare and coated specimens under air, natural seawater and cathodic protection was compared. The change of self-corrosion potential of CF process in seawater with the cycle was measured. The change of cathode current with cycle was recorded under different cathodic protection conditions. The results show that although the epoxy-based organic coatings in seawater significantly improve the CF life of 16Mn steel, the mechanism of coating action is not just a simple medium isolation. Under different cathodic protection conditions, the coated and uncoated samples show different laws, which means that there are different mechanisms of corrosion fatigue between the two. The Ca and Mg ions in seawater play an important role in the CF life of uncoated samples, while the effects on coated samples are small.