In order to reveal the mechanism of galvanic pitting corrosion initiation induced by typical complex inclusions in Al-Ti-Mg deoxidized high strength pipeline steel, first-principles calculations, combining with immersion tests, scanning electron microscopy was used to study the correlation between electronic work function and galvanic corrosion of Al-Ti-Mg killed steel. The results show that MnS inclusions act as anodes in the electrochemical environment, preferentially corroding and dissolving; MgAl₂O₄ and Al₂O₃ inclusions act as cathodes, leading to the corrosion of Fe matrix; different end planes of MgTiO₃ and MgTi₂O₄ act as both anodes and cathodes, but they have little effect on pitting corrosion. Microcrevices on the MgTiO₃ and MgTi₂O₄ inclusions boundary are the main cause of matrix dissolution.

为了揭示Al-Ti-Mg脱氧高强度管线钢中典型的复杂夹杂物引起的电蚀腐蚀的机理，采用第一性原理计算，并结合浸没试验，采用扫描电子显微镜研究了电子功之间的相关性。 Al-Ti-Mg镇静钢的功能和电腐蚀 结果表明，MnS夹杂物在电化学环境中起阳极作用，优先腐蚀和溶解。MgAl ₂ O ₄和Al ₂ O ₃夹杂物充当阴极，导致Fe基体腐蚀。MgTiO ₃和MgTi ₂ O _4的不同端面作为阳极和阴极，但它们对点蚀的影响很小。上为MgTiO Microcrevices ₃和MGTI ₂ ö ₄夹杂边界是基质溶解的主要原因。