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To address questions and concerns in the protective and marine coatings market, new laboratory data has been generated regarding corrosion rates and mechanisms that will help eliminate some of the assumptions regarding the role of soluble salts. These assumptions include soluble salt types such as chloride, sulfate, and nitrate along with the resulting conjugate corrosion products.
To address questions and concerns in the protective and marine coatings market, new laboratory data has been generated regarding corrosion rates and mechanisms that will help eliminate some of the assumptions regarding the role of soluble salts. These assumptions include soluble salt types such as chloride, sulfate, and nitrate along with the resulting conjugate corrosion products. It will also address some of the assumptions regarding surface preparation testing and treatment to provide for the highest level of cleanliness to achieve the highest performance of the applied coating system. This paper is likely more data driven than past papers seen regarding the topic of surface preparation for oil and gas linings and protective coatings which have been mainly focused on historical reference.
Modern design, manufacturing and field-testing specifications include surface profile and adhesion testing on the assumption that they are linked to long term corrosion prevention. There are a number of careful studies, dating back decades, that find no link between measurements of adhesion and (undercutting) corrosion performance, but other studies do, and the concept remains intuitively appealing and widely assumed.
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The effect of soluble salts on long-term durability of carbon steels coated with epoxy paint. A surface was contaminated by different soluble salt concentrations. Based on NORSOK M-501 and ISO 20340, immersion and cathodic disbonding test were done for 6 months.
International standards, both ISO and ASTM, require that the attributes exhibited during an adhesion test are recorded as part of the results. What are these attributes, how should they be recorded and what value are they to the inspector and applicator in assessing the reason for failure? This paper looks at all these questions and asks should we be going further than we do in defining the mode of failure.