塩化マグネシウム液滴腐食試験時に発生した SUS304腐食ピットの AE 特性
塩化マグネシウム液滴腐食試験時に発生した SUS304腐食ピットの AE 特性
复制标题
氯化镁液滴腐蚀试验中SUS304腐蚀坑的AE特征
DOI：
10.2320/jinstmet.74.559
复制
发表时间：
2010
影响因子：
--
通讯作者：
小島 真由美
中科院分区：
文献类型：
--
作者：
光晴 志波;海太 伊藤;博之 升田;寿 山脇;吉隆 足立;小島 真由美
提出了用声发射（AE）技术监测氯化物小液滴腐蚀的方法。采用高灵敏度声发射传感器，在声发射波形测量系统上对SUS304不锈钢薄板试样进行了腐蚀试验。在腐蚀试验中观察到三种类型的腐蚀，分别是开放式点蚀、覆盖式点蚀和蛇形腐蚀。在覆盖点蚀和蛇形腐蚀中有大量的声发射事件。相反，在开放点蚀中没有AE事件。利用EBSD对蛇形腐蚀截面进行了分析。结果表明，腐蚀表面下的退火孪晶和重合晶界的{111}界面处存在裂纹。因此，可以得出结论，检测到的声发射信号的腐蚀测试主要归因于在被覆盖的点蚀和蛇形腐蚀的开裂。
Acoustic emission (AE) monitoring for corrosion of small chloride droplet was proposed to investigate its mechanism. The corrosion testing in thin plate specimens of SUS304 stainless steel was conducted on an AE waveform measurement system with a high sensitivity AE sensor. Three types of corrosion were observed in the corrosion testing, which were the open pitting, covered pitting and snake-like corrosion, respectively. There were many AE events in the covered pitting and the snake-like corrosion. On the contrary, there was no AE event in the open pitting. Besides, the cross section of the snake-like corrosion was analyzed by EBSD. It shows that there were some cracks at the {111} interface of Σ3 coincidence boundary and annealing twins under the corrosion surface. Therefore, it can be concluded that the detected AE signals of corrosion testing were mainly attributed to the cracking in the covered pitting and the snake-like corrosion.
影响因子：
1.2
作者：
Ito, Kaita;Enoki, Manabu
通讯作者：
Enoki, Manabu