Comparison of H2S high-temperature corrosion characteristics of three kinds of low-alloy and heat-resistant-steel tubes. (3rd April 2021)

• Record Type: Journal Article
• Authors: Qin, Ming; Su, Hang; Wu, Wei; Wu, Jiangquan; Liu, Hui; Tan, Yaping; Yan, Mingqi
• Is Part Of: Corrosion engineering, science, and technology. Volume 56:Number 3(2021)
• Page Start: 289
• Page End: 298
• Publication Date: 2021-04-03
• Subjects: H2S -- high-temperature corrosion -- low-alloy and heat – resistant steel -- corrosion rate -- wall thickness reduction rate; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1080/1478422X.2020.1860730
• Languages: English
• ISSNs: 1478-422X

Abstract

ABSTRACT: This study investigates the H2 S high-temperature corrosion characteristics of three common heat – exchanging tubes for supercritical boilers, namely SA-213T12, 15CrMoG and 12Cr1MoVG. The high-temperature corrosion rates and wall thickness reduction rates of these three materials were investigated. The results indicate that the spalling of corrosion fragments produced by high-temperature H2 S corrosion is the main cause for the reduction in the tube wall thickness. Moreover, as a pressure component, the thinning of the water wall tube thickness is an important index to judge its service life. The bulk aggregation of corrosion products can easily cause the corrosion layer to fall off and make the corrosion reaction go inside. By comparison, the abilities of the three kinds of tubes for anti-H2 S high-temperature corrosion are ranked from weak to strong as follows: SA-213T12、15CrMoG and 12Cr1MoVG. Besides, the high-temperature H2 S corrosion process is the most sensitive to temperature.