Design And Development Of High-performance Weathering Steel Corrosion Test Cycle Infiltration System

Compared with carbon steel, the corrosion resistant steel has a more excellent corrosion resistance, which can be used for railways, vehicles, bridges, towers and other use of steel which long-term exposures to the atmosphere. In order to expand market share and meet market needs, iron and steel companies are increasing investments in technology to improve the quality of the corrosion resistant steel.To improve the quality of the steel, the researchers need to do lots of tests on resistance to corrosion to develop new products. Accelerated test method in the laboratory is usually used to accelerate the generation of stable rust layer, which may needs a few years to generate naturally. Therefore, it requires to design a set of accelerated corrosion test equipment to meet the scientific requirements.Taking Shougang Corporation and the corrosion resistant steel for railways as the background, the paper analyzes the accelerated corrosion test methods and supporting equipment, designs and manufactures a set of accelerated corrosion test equipment. The paper introduces the design and implementation of the equipment, including the overall design, the structural design and construction of the hardware, the development of the controlling software and the monitoring software, the establishment of fuzzy evaluation system and Based on Z-N method to achieve a self-tuning PID parameters.The test equipment uses PLC to control operations and the environment. Through the communication between touch screen and PLC, it can give the experimental parameters, control the operation of starting and stopping and display or storage the data. The equipment has the advantages of good reliability, consistency and high repeatability, operation simply and so on. It meets the original design requirements, has been put into use, and completed a large number of research trials.