The preparation of solution for derustiny, degreasing and phosphorizing steel;

ln this paper, the basic principle of automatic computer recognition of derusting grade of steel plate is proposed and studied, First, image information of derusted steel plate is taken by CCD picture pick -up device, then, shade of grey and oolor are digitized, images are carved up and contrasted, and the texture and structure are analysed.

The key problems for the application of high pressure water jet in rust removal and cutting are the easy adjustment and control of high pressure water, the design of the executive mechanism and safe and reliable operation of the equipment.

Described are the selection of the ball blasting rust removal method for couplers and components as well as the design and application of the ball blasting rust removal equipment for couplers and components.

During extending the air-cooling assembly unit of 2×200 MW in Taiyuan Sec-ond Electric Power Plant, a good result was acquired in applying the new type of HP-2A rust-removal agent to rust removal and anticorrosion of the inwall in the large-size piping with air-cooling circulation water.