Microbiologically influenced stress corrosion cracking failure of admiralty brass condenser tubes in a nuclear power plant cooled by freshwater

被引：80

作者：

Rao, TS ^{[1
]}

Nair, KVK ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr Facil, Water & Steam Chem Lab, Marine Biol Programme, Kalpakkam 603102, Tamil Nadu, India

来源：

CORROSION SCIENCE | 1998年 / 40卷 / 11期

关键词：

D O I：

10.1016/S0010-938X(98)00079-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The failure of admiralty brass condenser tubes in a nuclear power plant was investigated. Metallurgical analyses had indicated that stress corrosion cracking (SCC) could have caused the failure. Studies were carried out to see if bacteria could have played a role in bringing about the conditions which resulted in SCC of the tubes. Cooling water (Ranapratap Sagar lake, Kota, Rajasthan) quality and biofilm formation were monitored by analysing various physical, chemical, biochemical and biological parameters. Metal coupons were exposed online in the cooling water system to assess the microbial growth on the coupon surface by SEM. Corrosion rates were assayed by weight loss and corrosion products were analysed by XRD and ESCA. The study revealed the microbial reduction of nitrate to ammonia (estimated to be of the order of 5.8 mg l(-1) at the substratum-biofilm interface) which resulted in SCC of the admiralty brass tubes. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：1821 / 1836

页数：16

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