Division of Maritime, DNV · GL, Gimhae, 51004, Rep. of Korea.
Division of Maritime, DNV GL, Gimhae, 51004, Rep. of Korea 2Division of Marine Engineering, Mokpo Maritime University, Mokpo, 58628, Rep. of Korea.
J Nanosci Nanotechnol. 2019 Apr 1;19(4):2198-2201. doi: 10.1166/jnn.2019.16006.
Corrosion characteristics of SUS 304 and SUS 316L under the marine environment were investigated by plasma ion nitriding at 450 °C with a gas ratio of 25% N₂ and 75% H₂ for 10 hours. In the anodic polarization experiment performed in natural seawater, noble pitting potential and wide passive region were exhibited in SUS 316L due to the synergistic effect of molybdenum and nitrogen even after plasma ion nitriding compared with SUS 304. In the corrosion rate obtained by an extrapolation method after plasma ion nitriding, a similar result of corrosion current density represented in SUS 304 while lower corrosion current density was analyzed in SUS 316L.
采用 25%N₂和 75%H₂的气体比例，在 450°C 下对 SUS 304 和 SUS 316L 进行等离子体离子渗氮 10 小时，研究了它们在海洋环境下的腐蚀特性。在天然海水中进行的阳极极化实验中，与 SUS 304 相比，即使经过等离子体离子渗氮，SUS 316L 中的钼和氮的协同作用也表现出了较高的钝性点蚀电位和较宽的钝化区。在等离子体离子渗氮后的外推法得到的腐蚀速率中，SUS 304 中的腐蚀电流密度表现出相似的结果，而 SUS 316L 中的腐蚀电流密度则较低。
