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Method of Preventing White Rust in Galvanized Steel Strip – ROYAL GROOUP


Galvanized Steel Strip

Metal products processed by ordinary steel strip pickling, galvanizing, packaging and other processes

Galvanized steel strips is processed by ordinary steel strip pickling, galvanizing, packaging and other processes. It is widely used because of its good anti-corrosion performance. It is mainly used to make metal products that are cold-worked and no longer galvanized. For example: metal products such as light steel keels, peach-shaped columns for guardrails, sinks, rolling doors, bridges, etc.

The Main Purpose

General civil
Processing household appliances, such as sinks, etc., can strengthen door panels, etc., or strengthen kitchen utensils, etc.
achitechive
Light steel keel, roof, ceiling, wall, water retaining board, rain cover, rolling shutter door, warehouse inner and outer panels, insulation pipe shell, etc.
household appliances
Reinforcement and protection in household appliances such as refrigerators, washing machines, showers, and vacuum cleaners
Automobile industry
Cars, trucks, trailers, luggage carts, refrigerated truck parts, garage doors, wipers, fenders, fuel tanks, water tanks, etc.
industry
As the base material of stamping materials, it will be used in bicycles, digital products, armored cables, etc.
other aspects
Equipment enclosures, electrical cabinets, instrument panels, office furniture, etc.

Causes and Treatment Methods of Whitening Board Surface

If a layer of condensed water adheres to the surface of the galvanized layer, it will become a corrosive aqueous solution and adhere to the surface of the galvanized layer after reacting with oxygen, carbon dioxide, hydrocarbon, sulfur dioxide, soot, dust and other chemical gases. , forming an electrolyte. This electrolyte and the zinc layer with poor chemical stability undergo electrochemical corrosion, resulting in a powdery corrosion product - white rust

The main cause of zinc layer corrosion indoors is
① Indoor air humidity is high;
② The finished product is not dried and put into storage;
③ There is a layer of water film condensed on the surface of the zinc layer. When the moisture content in the air reaches 60% or in the range of 85-95%, and the pH<6, the corrosion reaction is more severe. When the water temperature is as high as about 70°C, the corrosion rate of the zinc layer is the fastest.

The method of preventing white rust is
① When stacking zinc plates, there should be no condensation on the surface;
② Air circulation should be maintained in the warehouse, and the relative humidity of the air should not be within the range of 60% or 85-95%;
③ There should be no harmful gas and excessive dust when stacking zinc plates;
④ Oil and passivate the surface of the galvanized layer.

If you want to know more about galvanized steel strip or other steel preservation tips, please feel free to contact us.

Tel/WhatsApp/WeChat: +86 153 2001 6383‬
Email: sales01@royalsteelgroup.com


Post time: Jul-12-2023