Post-Fire Mechanical Properties of Thermally Sprayed Anti-Corrosive Coatings in Oil and Gas Pipelines
Publication: Pipelines 2022
ABSTRACT
In the past 10 years, about 1,200 fire accidents were reported in oil and gas pipelines with protective coatings. Metallic coatings are popular in oil and gas pipelines due to their excellent performance in corrosion prevention. This paper quantifies the changes in mechanical properties such as hardness and wear-resistance of thermally sprayed anti-corrosive coatings in steel oil and gas pipelines exposed to fire accidents. Specifically, two types of wire arc sprayed metallic coatings, including the Zn-15Al and Zn-Al pseudo alloy coatings, are investigated. These coatings are exposed to high temperatures ranging from 300°C to 700°C for an hour simulating fire accidents and are cooled down by air cooling, which is common after an accident in the field. Results indicated that the Zn-Al pseudo alloy failed at 600°C and the Zn-15Al survived until 700°C. The results of this study will help to evaluate the integrity and residual life of metallic coatings used in steel pipelines after being exposed to fire accidents.
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Pipelines 2022
Pages: 203 - 210
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Published online: Jul 28, 2022
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