| 16MnR钢在高温高压碱溶液中应力腐蚀开裂行为的研究 | |
| 关辉 | |
| Subtype | 硕士 |
| Thesis Advisor | 朱自勇 |
| 1995-06 | |
| Degree Grantor | 中国科学院金属腐蚀与防护研究所 |
| Place of Conferral | 中国科学院金属腐蚀与防护研究所 |
| Keyword | 金属腐蚀 高温腐蚀 高压腐蚀 电化学腐蚀 |
| Abstract | 用慢应变速率（SSRT）、电化学测试和XRD、EDS等方法研究了不同极化电位和AlO_2~-离子对16MnR钢在260℃碱液中的应力腐蚀开裂行为的影响。试验结果表明温度改变会使16MnR钢在碱溶液中的自腐蚀电位发生很大变化，在室温到90℃之间电位下降，在90℃－130℃之间电位持平，而后直到260℃电位都在上升；阴极极化和阳极极化都可抑制16MnR钢在碱溶液中的应力腐蚀开裂，在高度钝化下，开裂可被完全抑制；大部分情况下，AlO_2~-对16MnR钢的碱脆有明显的抑制作用。对16MnR钢的高温碱脆机制以及电位、AlO_2~-影响碱脆的原因进行了探讨。 |
| Other Abstract | The stress corrosion cracking (SCC) behavior of 16MnR steel in high temperature (260℃), high pressure caustic solution is studied using slow strain rate tests (SSRT) and electrochemical measurement. To analyze the chemical composition and construction of films formed on the surface of 16MnR steel at various potentials in 5M NaOH and 5M NaOH+1.5M Al_2O_3·3H_2O solutions at 260℃, EDS and XRD were used. The results showed that the rest potential of 16MnR steel in the test solutions varied in a U shape with increasing temperature. Both the anodic and cathodic polarization could inhibit the SCC of 16MnR steel, and a high passive potential could inhibit the SCC completely. For most conditions, aluminate species (AlO_2~-) showed a inhibition effect on caustic embrittledment at 260℃. The mechanism of SCC and the effects of potential and AlO_2~- for 26MnR steel in high temperature caustic solutions was discussed. |
| Pages | 66 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/17607 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | 关辉. 16MnR钢在高温高压碱溶液中应力腐蚀开裂行为的研究[D]. 中国科学院金属腐蚀与防护研究所. 中国科学院金属腐蚀与防护研究所,1995. |
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