METHOD ESTABLISHING INHIBITING EFFICIENCY OF HYDROCARBONSOLVED CORROSION INHIBITOR UNDER CONDITIONS OF PRIMARY REFINING OF OIL Russian patent published in 2003 - IPC

FIELD: petroleum refining industry, petrochemical industry, determination of effectiveness of anticorrosion protection of industrial plants of primary oil refining. SUBSTANCE: method establishing inhibiting efficiency of hydrocarbon-solved corrosion inhibitor under conditions of primary refining of oil includes determination of coefficient (γ) of deceleration of corrosion of carbon steel in laboratory by gravimetric process. " Barrier " coefficient (γ_b) and degree (θ), of electrode filling are found in advance and are used for evaluation of adsorption capability of inhibitor with subsequent determination of coefficient of deceleration of cathode (γ_c) and anode (γ_a) reactions from which relation (lg, γ_a/γ_c) corrosion-electrochemical efficiency of inhibitor is estimated. Efficiency of inhibitor is found with coefficient γ of deceleration of steel above 10, concentration of inhibitor under 100 ppm, on basis of relationship γ: γ_b: θ: lg γ_a/γ_c which with γ_b/γ not less than 0.8, amounts to 1: (0.02-0.07):(0.02-0.2). In this case γ is taken as datum value and all other values correspond to it. EFFECT: raised authenticity and speed of establishment of inhibiting capability of substance under conditions of primary refining of oil. 1 tbl