The product is a water-soluble film corrosion inhibitor composed of compound pyridine  quaternary amine salt and other synergistic agents and surfactants. The product has good  geothermal stability and chemical stability. It is suitable for the corrosion prevention of oil field  water injection pipelines and equipment, and has a good protective effect on the corrosion  environment where the water temperature does not exceed 100℃, the content of acidic gases  such as CO2 and H2S is not higher than 20% and the salinity is not higher than 200,000 mg/L salt  water.