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首页> 外文会议>Meeting of the Electrochemical Society >Effect of Cr/Mo on the Protectiveness of Corrosion Scales on Carbon Steel in Sweet Medium under High Flow Regime
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Effect of Cr/Mo on the Protectiveness of Corrosion Scales on Carbon Steel in Sweet Medium under High Flow Regime

机译：Cr / Mo对高流量制度下甜培养基碳钢腐蚀鳞片保护性的影响

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摘要

We investigate the effects of Cr/Mo micro-alloying of plain carbon steel on the corrosion behaviour and scale protectiveness in CO_2 saturated (sweet) brine (0.5 M NaCl) environment, under hydrodynamic conditions, at 80°C in a slightly acidic environment (pH 6.6). Potentiostatic current transients indicate positive effects of Cr/Mo micro-alloying on an individual as well as synergistic level of the alloyents. Increase in Cr/Mo content appears to reduce the overall current passing through corrosion scale and encourage faster crystallization. SEM images suggest that Cr/Mo micro-alloying induced formation of thinner scale with better protectiveness. From the mechanistic perspective, we suggest that the addition of small amounts of Cr/Mo modulates the current due to dissolution of iron, as well as the current due to growth of a crystalline layer, by modifying the local environment at the steel surface. Modeling of the hypothesis is currently in progress.
机译：我们探讨了普通碳钢Cr / Mo微合金化对CO_2饱和（甜）盐水（0.5M NaCl）环境的腐蚀行为和规模保护性的影响，在水动力条件下，在略微酸性环境下（ pH 6.6）。电位电流瞬变表明Cr / Mo微合金化对个体的正效应以及合粘合剂的协同水平。 CR / MO含量的增加似乎降低了通过腐蚀量表的整体电流，并促进更快的结晶。 SEM图像表明CR / MO微合金化诱导形成较薄的刻度，具有更好的防护性。从机械角度来看，通过在钢表面上改变局部环境来增加由于铁的溶解，以及由于晶体层的生长而导致的少量Cr / Mo的添加调节电流。假设的建模目前正在进行中。

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