Yixiang Chang Cold Rolled Steel Enterprise Standard - Acid Pickling Commodity Roll
Acid pickling is a process used to remove surface metals and oxides from steel, aluminum and other substrates, improving the surface qualities of the material and making it easier to coat. The acid pickling process used by Yixiang Chang Cold Rolled Steel Enterprise is designed to deliver consistent and repeatable quality by removing all substrates of oil, scale, rust and paint, which can be harmful to the anodizing process. Specifically, the Yixiang Chang Cold Rolled Steel Enterprise Acid Pickling process is performed on cold rolled steel, using a combination of hydrochloric acid and phosphoric acid for anodic pickling. Hydrochloric acid is commonly used for manual strip and pickling operations, while phosphoric acid can be used for the same purpose.
The acid pickling process starts by placing the cold rolled steel into the pickling solution, which should be heated between 40°C and 70°C. Once in the solution, the steel should be agitated to ensure a thorough, even and uniform pickling action. This is followed by rinsing the steel with hot water two to three times to eliminate any remaining acid and any particles or residue.
The pickling solution should be drained, and the steel stripped of oil, scale, rust and paint. After the steel has been dried, the acid pickling can begin. The steel goes through a series of baths, starting with a hydrochloric acid bath and followed by a phosphoric acid bath. The hydrochloric acid bath is used to remove surface oxides and reduce the size of rust particles, while the phosphoric acid bath is used to dissolve the remaining rust particles. The steel should be inspected throughout the entire process for any signs of defects or damage.
The pickling process should finish with a final rinse in hot water, followed by a cold water rinse to cool the steel down. The steel should then be dried, before being rolled and ready for further processing or anodizing.
To ensure a quality acid pickling process, Yixiang Chang Cold Rolled Steel Enterprise requires tight control over the pH and temperature of the pickling baths, as well as the concentrations of the chemicals used. Any changes to the process parameters need to be identified, monitored and documented. If needed, corrective action can then be taken to maintain the pH and temperature within the desired range.
Moreover, any pickling operations carried out by Yixiang Chang Cold Rolled Steel Enterprise require appropriate safety measures to be taken, including wearing of acid-resistant clothing and safety glasses, good ventilation, as well as ensuring that relevant safety data sheets are readily available.
The Yixiang Chang Cold Rolled Steel Enterprise Acid Pickling process is designed to ensure high-quality results, by providing consistent and repeatable results for cold rolled steel. By utilising proper safety precautions, monitoring the pickling baths and adhering to the relevant quality standards, the acid pickling process can be used to safely and effectively remove contaminants and improve the surface qualities of the material.
