The offshore heavy oil project uses Floating Production, Storage and Offloading (FPSO) structural tanks to act as oil separators (washing tanks) a vital requirement. These tanks operate with a continuous layer of produced water at high operational temperatures and high residence time, creating a critical corrosive environment. This condition is far beyond typical conditions for tankers and makes the development of a special test necessary to qualify paint systems for that condition. Traditionally the qualification of paint systems in Brazil offshore units is based on NACE TM-0104 and ISO 20340 standards. But these standards have a test protocol based on physical/mechanical tests and corrosion tests. However, for this specific case, it did not suffice. Thus, a specific test was developed for washing tanks, which can evaluate simultaneously both corrosion and mechanical properties. This paper presents the development of a new test to simulate the behavior of paint systems submitted to cyclic tension in coatings in very corrosive environments (high salinity, CO2, and high temperature).

Subject
Corrosion fatigue, Materials, Aluminum spraying, Novolacs, Pull off adhesion test, Cracking resistance, Glass flake coatings, Epoxy coatings, Deflection, Fatigue, Holiday detection, Epoxies, Yield strength
Keywords:
tankers, coatings, fatigue, heavy oil, salinity
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2010
Association for Materials Protection and Performance (AMPP)
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