Steel surface rust removal method

Abstract

The invention discloses a steel surface rust removal method which comprises the following steps: S1, primary acid pickling: soaking steel subjected to oil removal treatment in a first acid pickling tank filled with an acid pickling solution A for primary acid pickling; washing the steel with clear water after soaking; and drying the steel for later use; S2, derusting and polishing: polishing the surface of the steel subjected to primary acid pickling treatment by using abrasive paper polishing equipment; specifically performing local derusting treatment on a seriously rusted part of the surface of the steel; cleaning rust slags generated by polishing on the surface of the steel after polishing; soaking the steel in a second pickling tank filled with a pickling solution B, and performing secondary pickling; washing the steel with clear water after soaking; and drying the steel for later use. The rust removal method has the beneficial effects that primary acid pickling, rust removal polishing, secondary acid pickling, sand blasting cleaning coarsening, rust remover soaking, rust removal detection and rust prevention protection are sequentially conducted, so that it can be guaranteedthat rust removal on the surface of the steel is comprehensive and thorough; rust removal missing of the steel is prevented, so that steel protection is more effective; the rust removal effect is verygood; and rust removal efficiency is improved.

Description

Technical field: [0001] The invention belongs to the technical field of derusting steel materials, in particular to a method for derusting the surface of steel materials. Background technique: [0002] Rust removal is a method of removing rust on the metal surface by various means. Metal rust is a metal oxide. Chemical, electrochemical, mechanical and other methods are used to remove oxides on the surface of equipment and its parts. Commonly used derusting methods include chemical derusting, electrochemical derusting, sand blasting, manual derusting and rolling derusting. ①Chemical derusting. Also known as etching and pickling. The acidic solution (or alkaline solution) reacts with the rust layer on the metal surface to dissolve, peel off and remove the rust layer. ② Electrochemical rust removal. Divided into anodic derusting method and cathodic derusting method. The anode rust removal method uses the electrochemical dissolution and chemical dissolution of the anode and...

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Problems solved by technology

[0004] The object of the present invention is to provide a method for removing rust on the surface of steel in order to solve the above problems, which solves the problem of using pickling to remove rust on the surface of steel. It is difficult to clean the parts with serious corrosion by pickling, which cannot meet the requirements of rust removal on steel. Requirements, resulting in the long time-consuming and low efficiency of steel derusting, and the disadvantages of affecting the service life of steel

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