EFFECT OF MARINE BIOFILMS ON CATHODIC PROTECTION

被引：24

作者：

DEXTER, SC

LIN, SH

机构：

[1] College of Marine Studies, University of Delaware, Lewes

来源：

INTERNATIONAL BIODETERIORATION & BIODEGRADATION | 1992年 / 29卷 / 3-4期

关键词：

D O I：

10.1016/0964-8305(92)90046-Q

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Cathodic protection is the most important method used for controlling marine corrosion, and the economics of the process are most favorable when calcareous deposits form on the metal surface Films of marine bacteria were formed on stainless alloy surfaces, and the interactions between these films and calcareous deposits were investigated as a function of the applied current density. A pre-existing bacterial film made the calcareous deposit more uniform at all current densities. The combined bacterial/calcareous film acted as a beneficial diffusion barrier at high current density, but the film acted as a detrimental cathodic depolarizer, increasing the current necessary for protection at low current density. The implications for cathodic protection under various conditions are discussed.

引用

页码：231 / 249

页数：19

共 31 条

[1]

Ambrose, Yaniu, Lee, Nucleation growth and morphology of calcareous deposits on steel in seawater, Corrosion/83, (1983)

[2]

Costlow, Tipper, Marine Biodeterioration, pp. 49-100, (1984)

[3]

Culberson, Effect of seawater chemistry on the formation of calcareous deposits, Corrosion/83, (1983)

[4]

Dahr, Howell, Bockris, The use of in situ electrochemical reduction of oxygen in the diminution of adsorbed bacteria on metals in seawater, Journal of The Electrochemical Society, 129, 10, pp. 2178-2182, (1982)

[5]

Dexter, Effect of variations in seawater upon the corrosion of aluminium, Corrosion, 36, 8, pp. 423-432, (1980)

[6]

Dexter, Role of microfouling organisms in marine corrosion, Biofouling, (1992)

[7]

Dexter, Lin, Effect of marine bacteria on calcareous deposition, Materials Performance, 30, 4, pp. 16-21, (1991)

[8]

Dexter, Lin, Calculation of seawater pH at polarized metal surfaces with calcareous deposits and biofilms, Corrosion/91, (1991)

[9]

Edyvean, Interactions between microfouling and the calcareous deposit formed on cathodically protected steel in seawater, Proc. 6th Int. Congress on Marine Corrosion and Fouling, pp. 469-483, (1984)

[10]

Edyvean, Moss, Microalgal communities on protected steel substrata in seawater, Estuarine, Coastal and Shelf Science, 22, pp. 509-527, (1986)

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