A Study On Performance Of Antioxidant Corrosion Inhibitor In Oil Field

The compound research of the oil field anti-oxygen corrosion inhibitor is mainly carried out from the oleic acid imidazoline and the deoxidizer hydrazine.This paper investigate and analysis model of oleic acid imidazoline and I~-,sulfocarbamide and sodium benzoate,and the ideal corrosion inhibitor compounding and filling scheme is determined for the conventional addition,pre-filming treatment and the filling process in the case of corrosion products.(1)According to the combination of deaerator and inhibitor,the corrosion inhibition rate can reach 87.24%when the temperature at 60?,dissolved oxygen content 10.35 mg/L,48 h,the mixture of deaerating agent and inhibitor is used by 1:1 about 300ppm.It has the best corrosion inhibition and economy.(2)In order to study the compound model,the synergistic adsorption model of 1.5%potassium iodide based on I~-as the base and the detomidine corrosion inhibitor showed a small amount of high-efficiency corrosion inhibition performance.The best use condition is that the temperature is lower than 80?,the pressure is not higher than 10MPa,the pH is between 6and 10,and the corrosion inhibition stability is the highest when the calcium ion concentration is lower than 20000 mg/L.(3)For the pre-film and corrosion products in the case of the treatment process.The best corrosion inhibitor is 5 times of corrosion inhibitor and 10 times of conventional dosage of pre-coating oil solution additive.For corroded pipeline such as P110 material,uniform and dense corrosion product film has a certain protective effect on steel,but N80 and 20#steel have poor effect.The process of adding corrosion inhibitor after atomization is the first choice.For the pre-film treatment process,the spray-type pipe cleaner pre-film process is selected,and the injection-injection process is the best for the conventional injection process.