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首页> 外文会议>13th International Conference on Environmental Degradation of Materials in Nuclear Power Systems 2007 >COMPARISON OF THE EFFECTS OF HYDROGEN PEROXIDE AND OXYGEN ON OXIDE FILMS ON STAINLESS STEEL AND CORROSION BEHAVIORS IN HIGH TEMPERATURE WATER
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COMPARISON OF THE EFFECTS OF HYDROGEN PEROXIDE AND OXYGEN ON OXIDE FILMS ON STAINLESS STEEL AND CORROSION BEHAVIORS IN HIGH TEMPERATURE WATER

机译：高温水中过​​氧化氢和氧气对不锈钢膜和腐蚀行为的影响

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摘要

In-situ measurements of corrosion behaviors of stainless steel specimens exposed to H_2O_2 and O_2 in high temperature water have been carried out. Oxide films on the specimens have been also examined with multilateral surface analyses and then the effects of both oxidants on oxide films and corrosion behaviors have been compared. The major differences between environments containing O_2 and H_2O_2 are summarized as follows. 1. The oxide films formed under H_2O_2 environment consists mainly of hematite with high electric resistance, while that under O_2 environment consists of magnetite. 2. Differences in ECP of stainless steel exposed to H_2O_2 and O_2 are caused by differences in chemical form of oxide and oxidation of H_2O_2 at the surface. 3. H_2O_2 caused higher ECP and lower corrosion current density than O_2 with the same oxidant concentrations, resulting from the effects of the thin oxide films with high electric resistance. 4. Lower corrosion current density results in lower IGSCC crack growth rate.
机译：进行了在高温水中暴露于H_2O_2和O_2的不锈钢试样的腐蚀行为的现场测量。还通过多边表面分析检查了样品上的氧化膜，然后比较了两种氧化剂对氧化膜和腐蚀行为的影响。包含O_2和H_2O_2的环境之间的主要区别总结如下。 1.在H_2O_2环境下形成的氧化膜主要由高电阻的赤铁矿组成，而在O_2环境下形成的氧化膜则由磁铁矿组成。 2.暴露于H_2O_2和O_2的不锈钢的ECP差异是由于表面化学形式和H_2O_2氧化形式的差异所致。 3.在相同的氧化剂浓度下，H_2O_2比O_2具有更高的ECP和更低的腐蚀电流密度，这是由于高电阻氧化薄膜的作用所致。 4.较低的腐蚀电流密度导致较低的IGSCC裂纹扩展速率。

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