关键词: 油管涂料, 环氧, 树脂酚醛, 防腐蚀, 高温高压, 耐磨性

Abstract: China is dependent on import of high-performance oil pipeline coatings at the present time. To change this situation, the high-performance YG oil pipeline anti-corrosion coating of solvent type is developed in the light of corrosion factors affecting downhole tubular of domestic oil and gas fields and with reference to the functions of imported anti-corrosion coatings. It is composed of bisphenol A epoxy resin and modified phenolic resin of high glass transition temperature. The film high temperature-resistant high-molecular polymer is formed as film by means of reaction under the heating condition. The coating’s fillers include superfine silica powder processed by silane coupling agent. The processed superfine silica powder has a better adhesion to the resin and improves compactness abrasive resistance of the coating. Subject to high-temperature and high-pressure tests (180°C, 70MPa), the coating is not cracking, bubbling or flaking in the pH 12.5 alkaline medium for 24 hours. The temperature for heat decomposition is no less than 260°C, meeting the anti-corrosion requirements for oil pipelines at acidic oil and gas fields.

Key words: oil pipeline coating, epoxy resin, phenolic resin, anti-corrosion, high temperature and high pressure, abrasive resistance