A study on the applicability of Si in low-Mo duplex stainless steel weld metals to improve the corrosion resistance

作者：Kim Sung Jin^*; Kim Jeong Kil; Park Sang Hong

来源：Scripta Materialia, 2015, 96: 33-36.

DOI：10.1016/j.scriptamat.2014.10.017

• Welding
• Secondary ion mass spectroscopy
• Stainless steels
• Corrosion
• Silicon

The applicability of Si in low-Mo duplex stainless steel weld metals is examined in terms of corrosion resistance and impact toughness. Nano-secondary ion mass spectrometry and three-dimensional atom probe analysis indicate that Si is enriched at the outermost layer in the form of Si-oxide a few nanometer thick, leading to a significant increase in critical pitting temperature without sacrificing the impact toughness. Improved corrosion resistance suggests that the thin oxide layer possibly acts as a diffusion barrier against aggressive ionic species.

• 出版日期2015-2