Tin Free steel plate is Wuxi steel plate, which is a thin steel plate that can be used instead of tin-plated steel plate without tin coating.
What are the main characteristics of Tin Free steel plate?
Good corrosion resistance: The lower layer of the coating is metal chromium, and the upper layer is hydrated oxide of chromium, which can effectively block the contact between the external environment and the steel plate substrate, prevent the steel plate from rusting and corrosion, and meet the corrosion resistance requirements of canned packaging such as beer and carbonated beverages.
Low cost: Compared with tin-plated steel plate, Wuxi steel plate has certain advantages in production cost because it does not need to use relatively expensive tin as a coating metal.
Good processing performance: It has similar processing performance to tin-plated steel plate, such as stamping, bending, stretching, etc., and can be made into packaging containers or other product parts of various shapes to meet different industrial production needs.
Strong surface adhesion: The surface coating has good adhesion to the steel plate substrate. In the subsequent processing and use process, the coating is not easy to fall off, ensuring the quality and performance of the product.
High coating and printing efficiency: The surface is relatively flat and smooth, which is conducive to the coating and printing of the paint, can improve the coating and printing efficiency in the production process, and can obtain good coating and printing effects, meeting the requirements of product appearance decoration and logo.
What is the manufacturing process of Tin Free Steel Plate?
It is generally made by electrolytic chromic acid treatment. There are one-step and two-step electrolytic chromate treatment lines:
One-step method: The strip steel passes through an electrolyte containing chromic acid and fluoride to directly precipitate metallic chromium and chromium hydrated oxide.
Two-step method: The strip steel is first chromium-plated and then re-treated with chromic acid to precipitate chromium hydrated oxide.
Classification of Tin Free Steel Plate
It is generally divided into two categories: chromium-based tin-free steel plate (TFS) and nickel-based tin-free steel plate. Currently, most of them refer to chromium-based tin-free steel plates.