We analyze the influence of numerous factors, such as an NS4 model soil medium, the load ratio (R = 0.1 and 0.9), and the potential of cathodic protection (–0.98 V) on the cyclic crack-growth resistance of the base metal and the metal of circular butt weld of 17G1S pipe steel in the intact state and after 30 years of the operation in a gas main. It is shown that the long-term operation of steel maximizes the negative influence of the soil medium on its cyclic crack-growth resistance under the combined action of the high load ratio and high potential of cathodic protection.

中文翻译：

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17G1S管钢焊接接头的循环腐蚀抗裂性

我们分析了许多因素的影响，例如 NS4 模型土壤介质、负载比（R = 0.1 和 0.9）以及阴极保护的潜力 (–0.98 V) 对贱金属的循环裂纹扩展阻力和17G1S 管钢圆形对接焊缝金属在完整状态下并在气管中运行 30 年后。结果表明，在高负荷比和高阴极保护电位的共同作用下，钢的长期运行使土壤介质对其循环裂纹扩展阻力的负面影响最大化。