Monitoring of corrosion extent is critical in bridge operation and civil buildings. Reducing the effective cross-sectional area of components can redistribute the stress state and increase the true stress in the critical parts of civil structures. Unexpected rupture of bodies can occur as a result of their over-stressing. However, it is not possible to take relevant samples from these structures for a laboratory analysis during their lifetime. For this reason, this study investigates the potential of magnetic Barkhausen noise analysis for real-time corrosion extent monitoring. This study demonstrates that Barkhausen noise emission drops down along with an increasing degree of corrosion of steel S460MC. Progressive and remarkable decrease of Barkhausen noise and alteration of extracted features result from increasing surface roughness and superimposing influence of the increasing thickness of the near-surface layers containing mainly iron oxides. Furthermore, it was found that corrosion on the surface also alters the relation between tensile stress and Barkhausen noise within the interaction volume.

腐蚀程度的监测在桥梁运营和民用建筑中至关重要。减小构件的有效截面积可以重新分配土木结构关键部位的应力状态，增加真实应力。由于压力过大，可能会发生身体意外破裂。但是，不可能在这些结构的生命周期内从这些结构中提取相关样本进行实验室分析。因此，本研究调查了磁性巴克豪森噪声分析在实时腐蚀范围监测中的潜力。该研究表明，随着钢 S460MC 腐蚀程度的增加，巴克豪森噪声排放下降。巴克豪森噪声的逐渐显着降低和提取特征的改变是由于表面粗糙度的增加和主要包含氧化铁的近地表层厚度增加的叠加影响。此外，还发现表面腐蚀也会改变相互作用体积内拉伸应力和巴克豪森噪声之间的关系。