Abstract In this work, the corrosion characteristics of a quenched and partitioned (Q&P) medium carbon steel in a 3.5 wt.% NaCl solution were investigated by various surface analysis techniques and then compared with those of the quenched and tempered steel with the same composition. Both steels exhibited nearly identical corrosion variation trends. However, the Q&P specimen demonstrated a lower corrosion rate. The formation of retained austenite in the carbon-enriched state increases the corrosion potential of the carbon-depleted martensitic matrix and decreases the residual tensile stress on the Q&P surface, thus enhancing its corrosion resistance.

中文翻译：

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淬火分配中碳钢在 3.5 wt.% NaCl 溶液中的腐蚀行为

摘要 本工作通过各种表面分析技术研究了淬火和分配(Q&P)中碳钢在3.5 wt.% NaCl溶液中的腐蚀特性，然后与相同成分的调质钢进行了比较。两种钢都表现出几乎相同的腐蚀变化趋势。然而，Q&P 试样表现出较低的腐蚀速率。富碳态残余奥氏体的形成增加了贫碳马氏体基体的腐蚀电位，降低了Q&P表面的残余拉应力，从而提高了其耐腐蚀性能。