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A new accelerated corrosion test for marine paint systems used for ship's topsides and superstructures
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
2018 (English)In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, Vol. 69, no 4, p. 447-459Article in journal (Refereed) Published
Abstract [en]

Several studies sponsored by the French Naval Authorities have been conducted during the last 10 years aiming to develop more reliable testing conditions than the conventional neutral salt spray test that should not be used for prediction of material performance. A satisfying correlation to atmospheric field exposure on a ship in service was observed using a 6 months cyclic test from the automotive industry (e.g., Volvo STD23-0014) with a deviation inferior to 25% and an acceleration factor of 4. The possibility to shorten the test duration with a target of 3 months without losing correlation to field exposures is investigated in the present study. A design of experiment is used to study key parameters such as NaCl concentration, the mode of salt application and its frequency as well as the temperature. Ten different marine paint systems used for shipbuilding have been selected. The results indicate an enhancement of the aggressiveness of the test when doubling the salt concentration from 1 to 2 wt%, increasing the number of salt spray per week (from 2 to 3), and the temperature from 35 to 45 °C. The data are compared to marine field exposures in tropical and temperate climates. The most reliable testing conditions to field exposure in marine sites of severity from low C5M to CX on steel include cyclic corrosion tests using 2 wt% of NaCl.

Place, publisher, year, edition, pages
Wiley-VCH Verlag , 2018. Vol. 69, no 4, p. 447-459
Keywords [en]
corrosion test, field exposure, marine paint, Automotive industry, Design of experiments, Paint, Ships, Sodium chloride, Steel corrosion, Steel testing, Accelerated corrosion tests, Acceleration factors, Corrosion tests, Cyclic corrosion tests, Marine paints, Material performance, Neutral salt spray test, Seawater corrosion
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-40485DOI: 10.1002/maco.201709814Scopus ID: 2-s2.0-85033710271OAI: oai:DiVA.org:ri-40485DiVA, id: diva2:1359881
Note

Funding details: Délégation Générale pour l'Armement; Funding details: B-1114-GEM1-ERG; Funding text 1: The authors acknowledge the financial support of the sponsors of the project “Corrosion Control for Navy Ships” under European Defence Agency contract B-1114-GEM1-ERG and particularly DGA (Délégation Générale de l'Armement). Frédéric Lédan, Adrien Hornsperger, and Vanessa Le Vern are also thanked for the laboratory work.

Available from: 2019-10-10 Created: 2019-10-10 Last updated: 2019-10-10Bibliographically approved

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