应力腐蚀行为上的氯化物,硫酸盐和碳酸盐阴离子的效果超离频强度钢 23Co14Ni12Cr3Mo 被裂开的应力腐蚀(SCC ) 学习用两倍伸臂横梁(DCB ) 的测试方法标本。SCC 形态学被使用扫描电子显微镜学(SEM ) 观察,腐蚀产品的作文被使用精力分析散分光计(版本) 。裂缝在 NaCl 和 Na 宣传到分叉的结果表演<潜水艇class=“ a-plus-plus ”> 2 那么<潜水艇class=“ a-plus-plus ”> 4 答案,当时在 Na 的裂缝<潜水艇class=“ a-plus-plus ”> 2 公司<潜水艇class=“ a-plus-plus ”> 3 答案宣传负担方向。在 NaCl 答案的 SCC 率最高,当更低时在 Na <潜水艇class=“ a-plus-plus ”> 2 那么<潜水艇class=“ a-plus-plus ”>在 Na 的 4 答案和很少<潜水艇class=“ a-plus-plus ”> 2 公司<潜水艇class=“ a-plus-plus ”> 3 答案。从 SEM 形态学,伪劈开骨折在 NaCl 和 Na 被观察<潜水艇class=“ a-plus-plus ”> 2 那么<潜水艇class=“ a-plus-plus ”> 4 个答案,但是 intergranular 在 Na 展示<潜水艇class=“ a-plus-plus ”> 2 公司<潜水艇class=“ a-plus-plus ”> 3 答案。钢 23Co14Ni12Cr3Mo 的 SCC 上的阴离子效果的机制被使用完整的沉浸测试和电气化学的大小学习。
The effects of chloride, sulfate and carbonate anions on stress corrosion behaviors of ultra-high strength steel 23Co14Ni12Cr3Mo were studied by stress corrosion cracking (SCC) test method using double cantilever beam (DCB) specimens. The SCC morphology was observed by using scanning electron microscopy (SEM) and the composition of corrosion products was analyzed by using energy dispersive spectrometer (EDS). The results show that the crack propagates to bifurcation in NaCl and Na2SO4 solution, while the crack in Na2CO3 solution propagates along the load direction. The SCC rate in NaCl solution is the highest, while lower in Na2SO4 solution and little in Na2CO3 solution. From the SEM morphologies, quasi-cleavage fracture was observed in NaCl and Na2SO4 solutions, but intergranular features in Na2CO3 solution. The mechanism of anion effect on SCC of steel 23Co14Ni12Cr3Mo was studied by using full immersion test and electrochemical measurements.