The effect of sulfur and lead on the corrosion of steam generator tubes made of alloy 690 thermally treated exposed to a wet steam environment at 320 °C

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-07-19 DOI:10.1016/j.corsci.2025.113202

Estelle Lagardère , Adil Shaik , Suraj Persaud , Nicolas Huin , Ian de Curières , Lydia Laffont

引用次数: 0

Abstract

The corrosion behavior of thermally treated (TT) alloy 690 steam generator (SG) tubes was studied in a wet steam environment at 320 °C with the addition of S and Pb. These pollutants are known to accumulate in heat transfer crevices in SGs and can contribute to stress corrosion cracking (SCC). Oxide penetrations were observed at the oxide-metal interface in both S-only and Pb/S-polluted environments. Characterization by transmission electron microscopy (TEM) revealed a growth of the oxide penetrations along {111} slip planes of the alloy and traces of S and Pb at the oxide-metal interface. Characterization results have enabled us to propose a model to explain the formation of these oxide penetrations and the potential role of Pb and S on them.

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硫磺和铅对暴露在320°C湿蒸汽环境中热处理的690合金蒸汽发生器管腐蚀的影响

研究了在320℃湿蒸汽环境下，添加S和Pb对热处理（TT）合金690蒸汽发生器（SG）管的腐蚀行为。众所周知，这些污染物会积聚在SGs的传热缝中，并可能导致应力腐蚀开裂（SCC）。在纯s和Pb/ s污染环境中，均观察到氧化物在氧化物-金属界面的渗透。透射电镜（TEM）表征显示，氧化物沿合金{111}滑移面渗透增加，氧化物-金属界面处有微量的S和Pb。表征结果使我们能够提出一个模型来解释这些氧化物渗透的形成以及Pb和S在其中的潜在作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.