Cause Analysis of Plate Pitting Corrosion in Lubricating Oil Cooler of Main Equipment in Datang Weihe Thermal Power Plant

Autor: Si Wei Yan, Xiao Jian Hu, La Jun Feng, Zhou Ping Li, Hai Yan Ma, Ai Jun Yan
Rok vydání: 2013
Předmět:
Zdroj: Advanced Materials Research. :1677-1681
ISSN: 1662-8985
Popis: The plate heat exchanger in oil cooler of unit 2 in a thermal power plant became corrosion perforation after 2-year running, and severe pits were found on its surface. The material and scale composition of the lubricating oil cooler was analyzed, and it was found that the oil cooler was made of 304 stainless steel, instead of the 316 stainless steel provided by factory. The corrosion products on the corroded surface were composed of some characteristic elements in cooling water. The analysis suggested that the reason for corrosion perforation of the heat exchanger could be associated with its material composition, and the under scale corrosion formed under the action of scale deposition could also cause corrosion perforation and large-scale pits.
Databáze: OpenAIRE