Treatment and machining process for steel piece casting and rust and corrosion prevention

Abstract

The invention discloses a treatment and machining process for steel piece casting and rust and corrosion prevention. The treatment and machining process for steel piece casting and rust and corrosion prevention belongs to the comprehensive technical field of mechanical manufacturing processes and corrosion prevention treatment, and comprises the following steps: firstly, casting a steel piece blank; eliminating the internal stress of the blank after cooling and then performing corrosion and rust prevention treatment on the surface of the blank; specifically, the surface of the blank is treated by using an acid-alkali-salt mixed method; a scavenger can be isolated from contacting with the steel piece, such that occurrence of over-corrosion of the steel can be prevented; the process is low in cost, simple, convenient and feasible, low in investment, applicable to coating pretreatment of steel pieces of various shapes and sizes, high in benefit and power-saving, and further capable of enabling the steel pieces to be high in resistance to bending, good in abrasion resistance and improved in corrosion resistance; meanwhile, the process enables cores of the steel pieces to be high in toughness, good in flexibility and fine in heat dissipation; as a result, the service life of the steel pieces is greatly prolonged, and the added value and industrial benefits thereof are high.

Description

technical field [0001] The invention belongs to the comprehensive technical field of mechanical manufacturing technology and anti-corrosion treatment, and the invention relates to casting and its anti-rust and anti-corrosion. In particular, it is a processing technology for steel casting and anti-rust and anti-corrosion treatment. Background technique [0002] A single physical or chemical method is often used to remove rust on the surface of steel. In the past, sandblasting and strong acid pickling were mainly used for rust removal. Sandblasting derusting requires large investment, high cost, high labor intensity, and pollutes the environment; and strong acid pickling is prone to over-corrosion, and secondary rust is often generated after pickling, and a large number of steel equipment is exposed to the air for a long time. At an extremely fast speed Corroded; in some rust removal and anticorrosion methods, the rust removal solution used contains unstable sodium sulfate do...

AI Technical Summary

Problems solved by technology

Sandblasting derusting requires large investment, high cost, high labor intensity, and pollutes the environment; and strong acid pickling is prone to over-corrosion, and secondary rust is often generated after pickling, and a large number of steel equipment is exposed to the air for a long time. At an extremely fast speed Corroded; in some rust removal and anticorrosion methods, the rust removal solution used contains unstable sodium sulfate dodecyl, so the stability of the rust removal solution is not high, and the rust removal speed is not fast; there are also cleaning, Brushing and other methods are generally used to remove the rust on the metal surface, but it is not thorough to remove the oxide scale, especially it is more difficult to remove the dense oxide layer on the surface of new steel. The process is complicated and takes a long time. Ideally, the oxide skin cannot be completely removed and cannot meet the required standards. In order to effectively remove the dense oxide layer of steel, large-scale components are currently treated with "sandblasting", but the investment in equipment, workshops, etc. requires hundreds of thousands to millions of dollars. Water, electricity, and air compressors, laying air ducts, erecting wires, and making sandblasting equipment. Spraying with quartz sand or even steel sand will cause serious air pollution, strict labor protection requirements, high cost, and high labor intensity.