Effect of QPQ technology on mechanical properties and corrosion resistance of petroleum tubes

Abstract

Quench polish quench (QPQ) is a specialized type of nitrocarburizing case hardening that increases corrosion resistance. In recent years, QPQ technology has attracted the attention of other industries, such as piston rod, oil and other industries. The workpiece treated with QPQ has good abrasion resistance and high corrosion resistance. The surface of the oil pipe is prone to rust, which inevitably affects its performance in the well. Aiming at the problems in practical application, the test method was used to evaluate the corrosion resistance of the treated samples in the atmosphere. By using API standard tensile test and electrochemical corrosion test, the mechanical properties and corrosion resistance of N80 treated with QPQ were studied.