Application of passivation technology in pipeline engineering

Corrosion, metal materials in engineering applications inevitably. In order to reduce the corrosion of the metal failure risk, engineering and technical personnel to many ways. Passivation process is in many ways the simplest, most practical, the lowest cost is applied to a variety of project types.
Passivation is the state that the metal surface is not easily oxidized, and the method of delaying the rate of metal corrosion is that the metal is changed from the active state to the passive state. The aim is to restrain the metal activity and reduce the corrosion rate of the metal.
Anhui Tianda Oil Pipe Co., Ltd. by Fe in different concentrations of HNO3 corrosion rate of that between Fe and the corrosion rate of HNO3 concentration diagram (see below), determined by oxidizing acid (or oxidizing acid salt) as a passivating agent, of metal materials, especially carbon steel passivation treatment. The passivation mechanism is the metal surface protect the membrane of solid product generation, will be separated from the metal and mechanical solution, called for the passive film. Due to such g-fe2o3 oxide film dissolution rate is very small, thus making metal corrosion rate reduce, passivation.
The company adopts the passivation process to deal with the steel pipe has been used in a large number of projects, has been unanimously praised.
The relationship between corrosion rate and concentration of HNO3 of the Fe (25 C)