Study on mechanism underlying the acceleration of pitting corrosion of B30 copper–nickel alloy by sulfate-reducing bacteria in seawater

钝化 硫酸盐还原菌 冶金 合金 铜水管的冲蚀腐蚀 腐蚀 点蚀 溶解 缝隙腐蚀 成核 硫酸盐 化学 材料科学 化学工程 复合材料 图层(电子) 有机化学 工程类
作者
Jian Wang,Huan Li,Min Du,Mingxian Sun,Ma Li
出处
期刊:Science of The Total Environment [Elsevier]
卷期号:928: 172645-172645 被引量:5
标识
DOI:10.1016/j.scitotenv.2024.172645
摘要

In this paper, the relationship between the pitting corrosion formation of B30 copper–nickel (CuNi) alloy and the metabolism of sulfate-reducing bacteria (SRB) was investigated. Combined with the influence of temperature during the actual operation of the cooling systems, the evolution law of the alloy passivation film was analyzed, and the mechanism of SRB promoting the accelerated development of B30 CuNi alloy pitting corrosion was revealed. The results show that SRB significantly promoted the pitting formation and development of B30 CuNi alloy. The maximum pitting depth was 3.9 μm in the sterile system and 15.3 μm with SRB, which was 3.9 times higher than that of sterile system. The loose porous Cu2S film formed by SRB metabolites and copper matrix was easily penetrated by corrosive anions, which promoted copper dissolution and led to pit nucleation. The sulfide adsorbed on the surface prevented or delayed the passivation of B30 CuNi alloy by blocking the adsorption site of O atom, and the corrosion nuclei continued to grow. The non-uniformity caused by the film peeling accelerated the longitudinal development of pitting corrosion, and the expansion and coalescence of adjacent pits caused the transverse development of pitting corrosion. Temperature had a certain influence on the SRB and the formation of B30 CuNi alloy passivation film. The passivation film was formed rapidly at 50 °C with poor quality and the passivation property of Cu2O film was weakened. With the increase of temperature, the pitting potential of sterile system negative shifted from 0.447 to 0.360 V (vs. SCE), while SRB system from 0.340 to 0.198 V (vs. SCE), and the pitting resistance decreased. The passivation film with defects and the Cu2S reduced the barrier efficiency of the film and accelerated the pitting corrosion of B30 CuNi alloy.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
夏风发布了新的文献求助20
刚刚
所所应助莫小烦采纳,获得10
2秒前
2秒前
久桃发布了新的文献求助10
2秒前
3秒前
ZX完成签到 ,获得积分10
4秒前
一蓑烟雨任平生完成签到,获得积分10
6秒前
兰陵萧笑声完成签到,获得积分10
6秒前
淡然靖柔完成签到,获得积分10
7秒前
7秒前
An发布了新的文献求助10
8秒前
久桃完成签到,获得积分10
9秒前
明理的凌旋完成签到,获得积分20
12秒前
默默冷松完成签到,获得积分10
13秒前
YNN完成签到,获得积分10
14秒前
背后归尘完成签到,获得积分10
16秒前
稳住完成签到,获得积分10
17秒前
18秒前
Pooh发布了新的文献求助10
21秒前
研学完成签到,获得积分10
22秒前
22秒前
23秒前
叶夜南完成签到 ,获得积分10
23秒前
Ava应助空格TNT采纳,获得10
24秒前
老王完成签到,获得积分10
24秒前
26秒前
莫小烦发布了新的文献求助10
29秒前
30秒前
32秒前
天将明完成签到 ,获得积分10
33秒前
Lucas应助明理的凌旋采纳,获得10
33秒前
诚心的砖头完成签到 ,获得积分10
34秒前
35秒前
redamancy发布了新的文献求助30
35秒前
36秒前
上官枫发布了新的文献求助10
37秒前
39秒前
巾凡完成签到 ,获得积分10
40秒前
小月亮完成签到,获得积分10
40秒前
友好寻真完成签到,获得积分10
40秒前
高分求助中
BIOLOGY OF NON-CHORDATES 1000
进口的时尚——14世纪东方丝绸与意大利艺术 Imported Fashion:Oriental Silks and Italian Arts in the 14th Century 800
Autoregulatory progressive resistance exercise: linear versus a velocity-based flexible model 550
Zeitschrift für Orient-Archäologie 500
The Collected Works of Jeremy Bentham: Rights, Representation, and Reform: Nonsense upon Stilts and Other Writings on the French Revolution 320
Play from birth to twelve: Contexts, perspectives, and meanings – 3rd Edition 300
Equality: What It Means and Why It Matters 300
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 物理化学 催化作用 细胞生物学 免疫学 冶金
热门帖子
关注 科研通微信公众号,转发送积分 3350943
求助须知:如何正确求助?哪些是违规求助? 2976496
关于积分的说明 8675277
捐赠科研通 2657650
什么是DOI,文献DOI怎么找? 1455181
科研通“疑难数据库(出版商)”最低求助积分说明 673739
邀请新用户注册赠送积分活动 664225