Abstract In situ Scanning Vibrating Electrode Technique and time lapse photography were used to study the galvanic corrosion of high strength low alloy (HSLA) steel, laser welded to hot stamped ultra high strength steel (UHSS) in 0.017 M NaCl. Samples of HSLA welded to UHSS exhibited corrosion focused on the UHSS. This galvanic effect was due to a -0.2 V difference in OCP for the UHSS. SVET derived metal loss increased by a factor of >2 for this couple. The localised corrosion observed may reduce the fatigue resistance and is of significance considering the increased use of thinner UHSS.

中文翻译：

---

用于汽车应用的焊接超高强度钢的电偶腐蚀

摘要 采用原位扫描振动电极技术和延时摄影技术研究了高强度低合金 (HSLA) 钢在 0.017 M NaCl 中激光焊接到热冲压超高强度钢 (UHSS) 上的电偶腐蚀。焊接到 UHSS 上的 HSLA 样品表现出集中在 UHSS 上的腐蚀。这种电流效应是由于 UHSS 的 OCP 差异为 -0.2 V。对于这对夫妇，SVET 衍生的金属损失增加了 2 倍以上。观察到的局部腐蚀可能会降低抗疲劳性，考虑到越来越多地使用更薄的 UHSS，这一点很重要。