Effect on the Adhesion of the Oxide Film: A flat and smooth surface helps to improve the adhesion between the oxide film and the alloy substrate. This is because the bonding between the oxide film and the substrate mainly relies on physical adsorption and chemical bonding. Good surface pretreatment can increase the contact area between them, enabling the oxide film to adhere to the substrate better. For example, on the surface of the alloy steel plate that has undergone fine grinding, the adhesion of the oxide film can be several times higher than that of the untreated surface. When subjected to external forces (such as friction, bending, etc.), the oxide film is less likely to fall off.

 

The Role of Chemical Conversion Films: Chemical conversion treatments (such as phosphating, chromating) form conversion films on the alloy surface, which have an important impact on the quality and performance of the oxide film. The conversion film can serve as the bottom layer for the growth of the oxide film. It has certain protective properties itself and can improve the bonding force between the oxide film and the substrate. Taking phosphating treatment as an example, the phosphating film is a porous phosphate crystal structure, which can adsorb more oxidizing substances and promote the growth of the oxide film during the oxidation process. Meanwhile, chemical bonds can be formed between the phosphating film, the substrate and the oxide film, enhancing the adhesion of the oxide film. The chromating film after chromating treatment has good corrosion resistance and can play a role in protecting the substrate in the initial stage of the formation of the oxide film and is conducive to the continuous growth of the subsequent oxide film.

 

Enhancement of Oxide Film Hardness and Wear Resistance: The oxide film formed by anodizing has relatively high hardness. This is because the crystal structure of the oxide film is optimized during the electrolysis process, making it denser. For example, after anodizing aluminum alloys, the hardness of the oxide film can be several times higher than that of the base material. This high-hardness oxide film can effectively resist wear and plays an important role in some application scenarios that require wear resistance (such as mechanical parts, building decoration materials, etc.).

 

 

 

 

Material: Steel Structure

Certification: ISO, CE, BV, ABS/CCS/BV

Ship Plate Standard: ASTM A131

Ship Plate Thickness: 5 mm ~ 80 mm

Ship Plate Length: 6000 mm ~ 25000 mm

 

The Influence of Thermal Oxidation Process

 

Improvement of Oxide Film Quality: During the thermal oxidation process, precisely controlling parameters such as heating rate, oxidation time and cooling rate can generate high-quality oxide films. A slow heating rate enables the elements inside the alloy to diffuse more evenly to the surface to participate in the oxidation reaction, so that the formed oxide film is denser and continuous. For example, when some alloys are subjected to high-temperature thermal oxidation treatment, appropriately extending the oxidation time can make the oxide film grow more completely, reducing internal defects and thus improving the protective performance of the oxide film.

 

Enhancement of High-Temperature Stability: The oxide film prepared by the thermal oxidation process has better stability in a high-temperature environment. This is because good chemical bonding is formed between the oxide film and the substrate during the thermal oxidation process, and the structure of the oxide film can remain relatively stable under high temperature. For example, for some high-temperature alloys used in the aerospace field, after thermal oxidation treatment, the oxide film on their surface can still effectively prevent the oxidation and corrosion of the alloys in a high-temperature and high-stress environment, ensuring the performance of the materials under extreme conditions.

 

Effect on the Structure of the Oxide Film: Thermal oxidation can change the structure of the oxide film. By controlling the thermal oxidation conditions, the oxide film can be formed into different crystal structures, such as crystalline and amorphous states. Crystalline oxide films usually have better mechanical properties and chemical stability, while amorphous oxide films may have advantages in some special cases (such as application scenarios with high requirements for flexibility). Different crystal structures can be adjusted according to specific application requirements to optimize the performance of the oxide film.

 

 

 

Why Choose Us?
We take pride in our ability to provide custom solutions for our customers' unique needs.
We analyze and compare the previous products and the current technical situation of our ABS Dnv CCS Marine A131 Grade A Galvanized Shipbuilding Steel Plate With Zinc Coating, and develop new technical specifications and processes.
Our customers trust us to deliver high-quality Cold-rolled Steel products on time and on budget.
We strictly implement the warm and thoughtful after-sales service, adhere to the development of good professional ethics.
We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
We adhere to the customer-centric and brand-oriented business philosophy, and continue to provide customers with reliable and excellent products and services.
Our factory is committed to upholding the highest standards of safety and quality.
All staff of our company and all departments work together to combine business management, professional technology, quantitative statistical methods and ideological education.
Our Cold-rolled Steel products are known for their durability and reliability.
Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.

 

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