Pickling process of A588 weather-resistant steel plate

A588 weather-resistant steel plate is a structural steel plate used in various atmospheric corrosion-resistant occasions. Compared with other structural steels, this kind of steel plate has superior atmospheric corrosion resistance, and has been used as the first choice material for structural steel structures by many industries.

In order to further improve its corrosion resistance, the A588 weathering steel plate must be pickled before use. The pickling process of A588 weathering steel plate mainly includes degreasing, pickling and passivation.

The degreasing of the A588 weather-resistant steel plate generally adopts chemical degreasing or electrochemical degreasing. The chemical degreasing method is to achieve the degreasing effect by using organic solvents with strong degreasing power, usually ethanol or gasoline. Electrochemical degreasing is to clean it in an electrolytic bath with a certain alkaline cleaning agent or pickling solution. After degreasing, the surface of the A588 weather-resistant steel plate should be free of all traces of oil, grease and other contaminants, and the surface should be smooth and clean.

The pickling of the A588 weather-resistant steel plate generally adopts chemical pickling or mechanical pickling. The chemical pickling is to use hydrochloric acid, nitric acid and other acid solutions as the pickling solution, and the mechanical pickling is to use emery powder and other abrasive materials to remove the rust and scale on the surface of the steel plate. The pickling time of the A588 weather-resistant steel plate needs to be carefully controlled to ensure that the steel plate surface meets the specified requirements.

Passivation is the third step of the pickling process for the A588 weather-resistant steel plate. Passivation is the process of using an oxidizing agent, such as oxidizing salts and nitric acid, to form a protective layer on the surface of the steel plate, so as to improve the corrosion resistance of the steel plate. After being passivated, the surface of the steel plate should be smooth and uniform without scale, rust or other contaminants.

The pickling process of A588 weathering steel plate is a key step to improve its atmospheric corrosion resistance. Careful control of the degreasing, pickling and passivation processes is essential to ensure that the steel plate meets specified specifications and performance requirements.