In this paper, the S-N curve of Zn-Al alloy coated steel wire was obtained by setting 30 groups with different corrosion-fatigue tests. The results show that the corrosion-fatigue resistance of Zn-Al alloy coated steel wire is preferable to high-strength steel wire. The crack initiation time of Zn-Al alloy coated steel wire is longer than high-strength steel wire, and the propagation speed is far lower than high-strength steel wire. Finally, a life prediction model considering corrosion-fatigue coupling effect is proposed. The calculation results show that the model considering corrosion-fatigue coupling effect can reflect the corrosion-fatigue coupling effect to some extent. The correctness of the theory is checked by comparing the calculation results with the experimental results.

通过设置30组不同的腐蚀疲劳试验，得到Zn-Al合金涂层钢丝的SN曲线。结果表明，Zn-Al合金涂层钢丝的耐腐蚀疲劳性能优于高强度钢丝。Zn-Al合金涂层钢丝的裂纹萌生时间长于高强度钢丝，而传播速度远低于高强度钢丝。最后，提出了一种考虑腐蚀-疲劳耦合效应的寿命预测模型。计算结果表明，考虑腐蚀-疲劳耦合效应的模型可以在一定程度上反映腐蚀-疲劳耦合效应。通过将计算结果与实验结果进行比较来检验理论的正确性。