文献类型：期刊文献

英文题名：Failure Analysis of Corrosion Perforation of Heat Exchanger Plate

作者：Sun, Haisheng[1,2];Wang, Yihan[1];Zhong, Jiru[1];Guan, Kaishu[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Lanpec Technol Ltd Shanghai, Shanghai 730070, Peoples R China

年份：2025

卷号：25

期号：2

起止页码：885

外文期刊名：JOURNAL OF FAILURE ANALYSIS AND PREVENTION

收录：EI(收录号：20251718291283);WOS:【ESCI(收录号:WOS:001472831400001)】；

语种：英文

外文关键词：Plate heat exchanger; Pitting corrosion; Structure design

摘要：In-depth investigation of corrugated plate heat exchanger plate made of 316 stainless steel was carried out with reference to equipment design, service conditions and materials of construction in this paper. The failure mechanism and cause were studied based on metallographic testing, micromorphological analysis and fluid simulation. Macroscopic inspection showed that the channels on the water side were severely blocked by deposits, and holes expanding from the water side were observed after clearing away the deposits. Pitting corrosion was observed on the surface of the heat exchanger plate by scanning electron microscopy (SEM) with a small amount of corrosion products. Oxides and chlorine were detected on both deposits and corrosion pits by energy dispersive spectrum (EDS). In summary, the cause of perforation is attributed to chloride ion pitting corrosion, and the process of chloride ion corrosion on stainless steel and the influencing factors are discussed. The result showed that the root cause of the blockage is a structural design defect in the heat exchanger plate's diversion area.