Assessment of coating quality in CP/coating systems

Conference · Tue Oct 01 04:00:00 EDT 1996

OSTI ID:379707

Steinsmo, U; Drugli, J M ^[1]

---

1. SINTEF Corrosion and Surface Technology, Trondheim (Norway)

The combined use of coatings and CP is an area which has developed significantly during the last decade. The use of coatings and CP has several advantages for offshore structures: the total current demand is reduced, an even current distribution and a fast polarization of the structure are achieved. An uncertain factor with respect to design of CP system and evaluation of cost benefits is the progressive coating deterioration with time. The paper presents data on coating degradation on cathodically polarized painted steel specimens exposed to natural sea water at ambient temperature. Coating degradation is monitored by measuring the current and by determining the rate of cathodic disbonding with time. The results from the sea water tests are compared with results from the tests used to qualify coatings for use on submerged steel structures i.e. ASTM G8: ``Standard Test Method for Cathodic Disbonding of Pipeline Coatings`` and BS3900 Part F10 ``Determination of resistance to cathodic disbonding of coatings for use in marine environments.``

• OSTI ID: 379707
• Report Number(s): CONF-960389--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
CATHODIC PROTECTION
CORROSION PROTECTION
CORROSIVE EFFECTS
COST BENEFIT ANALYSIS
ELECTRIC CURRENTS
OFFSHORE PLATFORMS
PERFORMANCE
PROTECTIVE COATINGS
SEAWATER
STEELS