Fires at the petrochemical industry facilities cause harm to human life and health and significant economic and environmental damage. Accidents associated with ignitions at oil and petrochemical storage facilities in 2018–2022, resulted in injuries of 21 persons, and 10 fatalities; the total economic damage exceeded 1.5 billion rubles.
One of the causes of fires is the spontaneous combustion of pyrophoric corrosive deposits (17 %). As a result of the reaction of the interaction of iron disulfide with oxygen in the air, pyrophoric corrosive deposits ignite. Large-scale steel equipment containing sulfurous oil is exposed during operation to corrosive and mechanical wear, risk of fires, and explosions.
One of the protection methods of oil and gas equipment against corrosion and pyrophoric formations is surface treatment with paint anticorrosive coating. Modern paint coatings proved to be ineffective in ensuring anticorrosive protection of metal equipment. The main objective of the article is to study various options of metal surface treatment by electrochemical methods with the following comparison of their protective ability.
The efficiency (isolating ability) of various treatments of St3 steel has been analyzed. Based on the results of electrochemical corrosive studies, chronogalvanometric curves have been built.
Therefore, to determine the efficiency of the protective effect of anticorrosive paint coatings, the accelerated corrosive-electrochemical method is recommended. For the treatment of the oil equipment surface, the anticorrosive paint coating containing the following layers: inhibitor (urotropinу solution); primer (sodium polyacrylate, ethyl alcohol); and two layers of sodium polyacrylate, have been proposed to use. The application of this protective coating will ensure a fault-free mode of operation of oil equipment for more than 10 years without coating replacement. This will guarantee the safe work of employees at the petrochemical industry facilities.
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