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利用平板及单边裂纹试样研究了１％ＮａＮＯ２对Ａ５３７钢在３．５％ＮａＣｌ水溶液中腐蚀疲劳寿命与裂纹扩展的缓蚀作用，并在不同应变速率与外加电位下研究了相应体系圆柱形应变电极的电化学响应规律．结果表明，ＮａＮＯ２对裂纹萌生过程具有抑制作用，从而提高腐蚀疲劳寿命．即使在阴极极化条件下，动态应变的一定阶段仍可有较大的阳极溶解电流密度，这显示了ＮａＮＯ２对裂纹扩展过程作用的复杂性．分析表明，ＮａＮＯ２存在的情况下，形变引起的附加阳极电流密度除受到形变速率与新表面再钝化速率控制外，还强烈地受到表面滑移状态的影响．
The corrosion inhibition effect of 1% NaNO2 on the corrosion fatigue life and crack growth of A537 steel in 3.5% NaCl aqueous solution was studied by using flat plate and unilateral cracked specimens. The effects of different strain rates and applied potentials on the corrosion behavior of A537 steel were investigated. Electrochemical response of strain electrode. The results show that NaNO2 can inhibit the initiation of cracks and improve the corrosion fatigue life. Even at cathodic polarization, a larger anodic dissolution current density can still be observed for a certain stage of dynamic strain, which shows the complexity of the effect of NaNO2 on the crack propagation. The analysis shows that in the presence of NaNO2, the additional anodic current density caused by deformation is strongly affected by the surface slipping state, besides the deformation rate and the rate of new surface reactivation.