表面技术Issue(5)：25-28,4.
P91钢亚音速喷涂NiCr/Cr3C2涂层的热腐蚀行为研究
Hot Corrosion Behavior of Subersonic Sprayed NiCr/Cr3C2 Coating on P91 Steel
繆筱玲 1汪元奎 1刘光明 2陈嵩松3
作者信息
- 1. 东方电气集团东方锅炉股份有限公司材料研究所,自贡643001
- 2. 南昌航空大学无损检测技术教育部重点实验室,南昌330063
- 3. 成都市长诚热喷涂技术有限责任公司,成都610300
- 折叠
摘要
Abstract
NiCr/Cr3C2 coating was prepared on P91 steel by subsonic flame spraying process. The hot corrosion tests of the coated samples were conducted in 80%Na2SO4 + 10%K2SO4 + 10%KCl molten salts at 600,650 and 700 ℃, respectively. The surface morphology and microstructures of corroded samples were examined by XRD and SEM. It is shown that the the corrosion products spall from sample surface on a large scale, which lead to mass loss during the tests. Especially, mass loss is accelerated when the samples are tested at 700 ℃. After oxidation the corroded products on the samples surface are mainly composed of Ni3 S2 and Cr2 O3. Sulfides layer is observed at the interface of substrate/ coating, which resultes in weak-bonding interface and lead to corrosion products spalled from smaple surface during hot corrosion.关键词
NiCr/Cr3C2涂层/热腐蚀/Na2 SO4 -K2 SO4-KClKey words
NiCr/Cr3C2 coating/hot corrosion/Na2 SO, -K2 SO4 -KC1分类
矿业与冶金引用本文复制引用
繆筱玲,汪元奎,刘光明,陈嵩松..P91钢亚音速喷涂NiCr/Cr3C2涂层的热腐蚀行为研究[J].表面技术,2011,(5):25-28,4.
