British Corrosion Journal最新文献_第9页

Electrochemical ac and dc response of copper in sea water at different anodic potentials 不同阳极电位下铜在海水中的交流和直流电化学响应

British Corrosion Journal Pub Date : 2001-02-01 DOI: 10.1179/000705901101501596

E. Garcia, J. Uruchurtu, Juan Genesca

引用次数: 3

Use of galvanostatic pulse measurements on active reinforcing steel in concrete to assess corrosion rates 对混凝土中活性钢筋进行恒流脉冲测量以评估腐蚀速率

British Corrosion Journal Pub Date : 2001-01-01 DOI: 10.1179/000705901101501433

D. Law, S. Millard, J. Bungey

{"title":"Use of galvanostatic pulse measurements on active reinforcing steel in concrete to assess corrosion rates","authors":"D. Law, S. Millard, J. Bungey","doi":"10.1179/000705901101501433","DOIUrl":"https://doi.org/10.1179/000705901101501433","url":null,"abstract":"Abstract This paper reports the results of galvanostatic pulse transient response experiments to determine the corrosion parameters associated with actively corroding reinforcing steel in concrete. Galvanostatic pulse measurements have been conducted on a number of short 100 mm sections of steel reinforcing bar embedded in chloride contaminated concrete. The duration of the applied galvanostatic pulse was 90 s and the lateral distance of the point of measurement from the bar varied from zero to 400 mm. All of the bars monitored were conditioned so that they were actively corroding at different rates. Analysis of the galvanostatic pulse transient response has enabled the separate components that make up the measured transients to be isolated and evaluated. These components display a range of resistivities and capacitances, dependent on the corrosion condition of the reinforcing steel, which may be attributed to the corrosion process, to effects within the concrete cover, or to film effects on the surface of the concrete. Other investigators using this technique have evaluated the corrosion rate by summation of the separate corrosion components, i.e. simply summing all of the resistance values to obtain an aggregated corrosion resistance. However, it is possible that not all resistances identified are associated with the loss of steel from the surface of the reinforcement. Significant variations in corrosion rates have been observed dependent on the assignment of the separate components to either corrosion or to other processes. The data indicate that it is not feasible to assign the component based solely on the capacitance. An inappropriate selection of measurement time or equilibrium time may result in part of the resistance associated with the corrosion process being left out or an additional resistance not controlling the rate of corrosion being included.","PeriodicalId":9349,"journal":{"name":"British Corrosion Journal","volume":"5 1","pages":"75 - 80"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87370744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Corrosion assessment of reinforced concrete structures in corrosive environments in Chinese chemical industry 我国化工行业腐蚀环境中钢筋混凝土结构的腐蚀评价

British Corrosion Journal Pub Date : 2001-01-01 DOI: 10.1179/000705901101501424

H. Da, K. Gowers, W. Dongwei, L. Dawang, Z. Zhuo, S. Millard

引用次数: 2

Corrosion and erosion-corrosion of electrodeposited Ni–P/B4 C composites 电沉积Ni-P / b4c复合材料的腐蚀与冲蚀

British Corrosion Journal Pub Date : 2001-01-01 DOI: 10.1179/000705901101501488

B. Bozzini, P. Cavallotti, G. Parisi

引用次数: 17

Electrochemical behaviour of copper–silver alloys in sodium carbonate aqueous solution 铜银合金在碳酸钠水溶液中的电化学行为

British Corrosion Journal Pub Date : 2001-01-01 DOI: 10.1179/000705901101501505

A. Zaky

引用次数: 20

Electrolyte and temperature effects on pitting corrosion of type 316LN stainless steels 电解液和温度对316LN不锈钢点蚀的影响

British Corrosion Journal Pub Date : 2001-01-01 DOI: 10.1179/000705901101501460

S. Ningshen, U. Mudali, R. Dayal

{"title":"Electrolyte and temperature effects on pitting corrosion of type 316LN stainless steels","authors":"S. Ningshen, U. Mudali, R. Dayal","doi":"10.1179/000705901101501460","DOIUrl":"https://doi.org/10.1179/000705901101501460","url":null,"abstract":"Abstract The influence of electrolyte composition and temperature on the pitting corrosion resistance of nitrogen bearing (0·015, 0·198, and 0·56%N) type 316L stainless steels has been investi gated. Anodic polarisation curves were determined in neutral chloride solution at room temperature and at elevated temperatures of 308, 318, and 333 K. Similar polarisation studies were also conducted at room temperature in 1N H2 SO4 and in an acidic chloride solution containing 1N H2 SO4 and 0·5M NaCl. The results show that the critical pitting potential Epp in neutral chloride and acidic chloride media increases as the nitrogen content of the alloy increases, indicating that resistance to pitting increases with the addition of nitrogen. However, in 1N H2 SO4 solution, the transpassive potential was almost independent of the nitrogen content. As the temperature of the neutral chloride medium was increased, the Epp values decreased, irrespective of nitrogen content. The decrease in Epp is attributed not only to the temperature induced modification of the passive oxide film but also to chloride induced activity at the passive film/solution interface. Nevertheless, the alloy con taining 0·56% nitrogen showed better resistance to pitting at 333 K than did the alloy with 0·015% nitrogen at room temperature. SEM examination of the pitted specimens showed clear evidence of pitting for the alloy with 0·015% nitrogen, but insignificant pitting attack for the alloy with 0·56%N. However, the alloy with 0·56%N displayed some pitting attack when the experiments were conducted at 333 K.","PeriodicalId":9349,"journal":{"name":"British Corrosion Journal","volume":"100 1","pages":"36 - 41"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75092370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Mechanistic changes in cut edge corrosion induced by variation of inhibitor pigmentation in organically coated galvanised steel 有机镀锌钢中缓蚀剂色素沉积变化引起的切削边缘腐蚀机理变化

British Corrosion Journal Pub Date : 2001-01-01 DOI: 10.1179/000705901101501479

H. McMurray, S. Powell, D. Worsley

引用次数: 37

Strain rate induced stress corrosion cracking in buried pipelines 埋地管道应变速率诱发应力腐蚀开裂

British Corrosion Journal Pub Date : 2001-01-01 DOI: 10.1179/000705901101501415

G. Gabetta, S. Di Liberto, A. Bennardo, N. Mancini

{"title":"Strain rate induced stress corrosion cracking in buried pipelines","authors":"G. Gabetta, S. Di Liberto, A. Bennardo, N. Mancini","doi":"10.1179/000705901101501415","DOIUrl":"https://doi.org/10.1179/000705901101501415","url":null,"abstract":"Abstract Transgranular stress corrosion cracking (TGSCC) has been observed in buried pipelines where the metal is in contact with a dilute solution under a disbonded coating. It is already known that such cracking involves the evolution and permeation of hydrogen at the crack tip, as previously observed in nuclear pressure vessel steels and other low alloy steels under variable loading. This cracking mechanism is much more influenced by loading conditions (crack tip strain rate) than by the solution chemistry. With reference to pipeline steels, several authors claim that it is difficult to reproduce in the laboratory the actual cracking morphology observed in the field. The present paper presents and discusses the results of tests where the fracture surface appearance observed in pipes taken from service has been reproduced. In this work, attention has been focused on mechanical factors rather than chemical parameters. It is proposed that the term low pH stress corrosion cracking, normally used to define the cracking phenomenon, is inappropriate and can be misleading. If greater attention is paid to strain rate and loading parameters, TGSCC in buried pipelines can be reproduced in laboratory tests (with no major influence of solution pH) and the phenomenon can be better described. Through a comparison with data in the literature data describing the behaviour of landslides, the hypothesis that crack growth occurs only during short intervals, followed by long periods where only generalised corrosion takes place, is proposed. This is consistent with features observed on the fracture surfaces of pipelines that failed in service.","PeriodicalId":9349,"journal":{"name":"British Corrosion Journal","volume":"30 1","pages":"24 - 28"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88588562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Effects of hydrogen on formation of passive films on AISI 310 stainless steel 氢对AISI 310不锈钢钝化膜形成的影响

British Corrosion Journal Pub Date : 2001-01-01 DOI: 10.1179/000705901101501451

Z. Qin, P. Norton, J. Luo

引用次数: 5

Chromate passivation of hot dipped Zn25Al alloy coatings 热浸Zn25Al合金镀层的铬酸盐钝化

British Corrosion Journal Pub Date : 2001-01-01 DOI: 10.1179/000705901101501497

Y. Li, H. Wang, B. Hou, F. Feng, X. Wei

引用次数: 13