Parametric studies of the formation of calcareous deposits on cathodically protected steel in seawater

Journal Article · Sat May 01 04:00:00 EDT 1993 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2220970· OSTI ID:6448814

Yan, J -F; Griffin, R B ^[1]; White, R E ^[2]

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1. Texas A and M Univ., College Station (United States)
2. Univ. of South Carolina, Columbia (United States)

A first principle mathematical model has been used to study the effects of ocean environment and cathodic protection on the formation of calcareous deposits and their ability to reduce the cathodic current density. These parameters include applied potential, rotation speed, temperature, salinity, and depth. The results showed the applied potential strongly influences the formation of calcareous deposits and their ability to reduce the cathodic current density. Among the environmental factors, rotation speed has the most influence on the cathodic current density. Salinity slightly influences the cathodic current density over the range of interest. Temperature is much more influential than salinity on the ability of calcareous deposits to reduce the cathodic current density. The results from modeling showed the formation rate of calcareous deposits to reduce the cathodic current density. The results from modeling showed the formation rate of calcareous deposits is much lower at 5 C than at room temperature. The depth is very critical not only to cathodic current density but also to the formation of calcareous deposits in seawater. The formation of calcareous deposits would be expected to be slower and the deposits would contain more Mg(OH)[sub 2] in deep water.

• OSTI ID: 6448814
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 140:5; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
42 ENGINEERING
423000 -- Engineering-- Marine Engineering-- (1980-)
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CATHODIC PROTECTION
CORROSION PROTECTION
CURRENT DENSITY
DEPOSITION
DEPOSITS
DEPTH
DIMENSIONS
ELECTRIC POTENTIAL
HYDROGEN COMPOUNDS
HYDROXIDES
IRON ALLOYS
IRON BASE ALLOYS
MAGNESIUM COMPOUNDS
MAGNESIUM HYDROXIDES
MATHEMATICAL MODELS
MOTION
OXYGEN COMPOUNDS
PARAMETRIC ANALYSIS
ROTATION
SALINITY
SEAWATER
STEELS
TEMPERATURE DEPENDENCE
UNDERWATER FACILITIES
WATER