ABSTRACT

The corrosion of bridging structures affects their stiffness and load-carrying capacity. Hence, predicting the degree of corrosion is critical for their reliability and safety. This study examined the applicability of the newly developed accelerated corrosion test authorised by ISO 16539 Method B for evaluating the corrosion characteristics of the weathering structural steel. The non-coated weathering steel was subjected to 28, 84, and 168 days of accelerated cyclic corrosion test. The same steel material was subjected to atmospheric exposure tests for 6 and 12 months at different locations. The corrosion behaviours of these different tests were compared by the semivariogram analysis. The results indicated that the corroded surfaces of the non-coated weathering steel obtained from the accelerated cyclic corrosion test and atmospheric exposure tests have similar spatial characteristics. The accelerated cyclic corrosion test could simulate the corrosion behaviour of the weathering steel under actual environments.

摘要

桥接结构的腐蚀会影响其刚度和承载能力。因此，预测腐蚀程度对其可靠性和安全性至关重要。本研究检验了 ISO 16539 方法 B 授权的新开发的加速腐蚀试验在评估耐候结构钢腐蚀特性方面的适用性。无涂层耐候钢经受了 28、84 和 168 天的加速循环腐蚀试验。相同的钢材在不同地点进行了 6 个月和 12 个月的大气暴露测试。通过半变异函数分析比较了这些不同测试的腐蚀行为。结果表明，加速循环腐蚀试验和大气暴露试验获得的无涂层耐候钢腐蚀表面具有相似的空间特征。加速循环腐蚀试验可以模拟耐候钢在实际环境下的腐蚀行为。