How to Choose The Right Color Coated Steel For Your Project?

Color coated steel is made of galvanized steel or aluminum-zinc-coated steel as the substrate. After surface pretreatment (degreasing and chemical treatment), a layer of organic coating is applied on the surface of the substrate by roller coating, and then baked and cooled.

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Table of Contents

• Determine project requirements
• Understand the performance of color coated steel
• Evaluating Costs
• Selection of reliable suppliers
• Wanzhi Steel Advice
• Wanzhi Steel-China&#;s most professional manufacturer of color coated steel

Color coated steel has various colors, rich patterns, beautiful appearance, strong corrosion resistance, good processing performance, and is widely used in construction, furniture, home appliances and other industries. How should color-coated steel be selected for specific projects? This article mainly explains how to choose the right color-coated steel for your project?

Determine project requirements

1. Usage Scenario

• Determine which part of the building the color-coated steel will be used in (e.g., exterior walls, roofs, etc.) or whether it will be used in appliances, furniture, automobiles, etc.
• Consider the climatic and environmental conditions of the project site, such as temperature, humidity, corrosive substances, etc.

If you consider temperature, for example, light colors keep buildings cool and reflect sunlight. Dark colors warm buildings because they absorb heat.

2. Performance Requirements

After determining the usage scenario, consider what the usage scenario requires in terms of the performance of the color coated steel, such as corrosion resistance, aesthetics, and mechanical properties.

• Corrosion resistance: According to the climatic and environmental conditions of the project location, determine the requirement of corrosion resistance.
• Aesthetics: whether the color, pattern, texture, etc. of the color coated steel surface matches the overall design style of the project.
• Mechanical properties: Consideration of mechanical properties is mainly to ensure that the color coated steel can meet the structural requirements of the project.

Understand the performance of color coated steel

1. Coating performance

Coating types

Understand the characteristics of different coatings (PE, SMP, HDP, PVDF) and applicable scenes.

For example, PE coating is inexpensive and many products, easy to process molding, color and gloss of the choice of a large margin, but ultraviolet resistance and chalking resistance is not ideal.

PVDF coatings have very good corrosion resistance and color retention, ultraviolet resistance and heat resistance is also very outstanding, is the construction of industrial use of color coated steel coatings in the highest level of products.

Coating thickness

The thicker the coating, the better the corrosion resistance, but the price will also increase.

Coating Adhesion

Ensure a strong bond between the coating and the substrate to avoid coating peeling off during use.

2. Substrate properties

Types of substrates

There are generally two types of substrates for architectural color coated panels, hot-dip galvanized panels and aluminum-zinc coated panels. Pure zinc outperforms aluminum-zinc alloys in alkaline media, and the opposite is true in acidic media. Therefore, aluminium-zinc plated colour coated steel should be used in relatively acidic environments and galvanized colour coated steel should be used in relatively alkaline environments.

Substrate Thickness

Select the appropriate substrate thickness according to the project structure and load bearing requirements.

3. Other properties

Processing performance

Consider whether the processing performance of the color coated steel, such as shearing, bending, drilling, etc., meets the needs of the project.

Fire resistance

Select color coated steel with appropriate fire resistance according to project requirements.

Evaluating Costs

1. Material cost: Determine the material cost based on factors such as the type of coating, substrate type and thickness of the color coated steel.
2. Processing cost: Consider the processing cost of cutting, punching, welding, etc. of the color coated steel.
3. Transportation and installation costs: evaluate transportation and installation costs based on the geographic location and scale of the project.

Selection of reliable suppliers

1. Brand reputation: choose manufacturers with strength and reputation to ensure product quality and after-sales service.
2. Production capacity: Understand the production scale and technical level of the supplier to ensure that it can meet the needs of the project.
3. Product certification: Check whether the products have passed relevant quality certifications, such as ISO quality management system certification.
4. Service support: Find out whether the supplier provides commitments in terms of technical support, delivery time and after-sales service.

Wanzhi Steel Advice

Wanzhi Steel&#;s suggestions for using color-coated steel for projects are as follows:

Wanzhi Steel-China&#;s most professional manufacturer of color coated steel

• The enterprise is ISO :201 certified, with 13 years of export experience, serving more than 120 countries, high customer ratings, and high repurchase rate of products.
• With two color coated steel production lines and two written steel plate production lines, the annual production is 60w tons, which can meet the demand of any scale project, and has enough production capacity for large quantity orders.
• With a professional testing center and more than 20 professional inspectors, we will carry out a comprehensive inspection on the color coated steel before leaving the factory, including performance, appearance, specification and so on. We also support third party testing.

We have rich and professional experience in the field of color coated steel, if you have any questions about color coated steel, please feel free to contact us, we guarantee to answer you within 12 hours.

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Coated steels are steel sheets that have a metallic and/or non-metallic coating to prevent rust and corrosion that humidity and contamination can cause on the steel.

Coated steel has an extra layer of metal, paint, or both to protect it from rust and wear. It is ideal for those who are looking for resistant, aesthetic, light, and cost-effective materials in industries such as construction, automotive, white goods, and other growing sectors.

Steel Coating Process:

Inception

• The basis of most coated steel is cold-rolled steel.
• The sheet is covered with a metallic and/or non-metallic coating to prevent rust and corrosion that humidity and contamination can cause on the steel.
• Metallic coatings can consist of a zinc layer (Zintro) or alloys of zinc and other materials such as aluminum (Zintro Alum).

Galvanization

• Galvanization can be done by immersion in molten metal or by electrochemical processes.
• The process starts with the placement of cold-rolled steel sheets.
• The edge of each roll is trimmed to remove imperfections.
• Then, it goes through alkaline or direct flame cleaning process to eliminate residues such as oil or particles.
• The sheet is then transported to a continuous annealing furnace to recover structural properties and ductility.
• It is then immersed in a molten metal crucible in which coating is adhered to; excess liquid metal is swept off with air or gas.
• Finally, the sheet is given a surface finish, treated with a chemical solution to protect the coating, a thin layer of oil oxide is applied, and then it is rolled.

Electrogalvanization

• Electrogalvanization consists of immersing the material in an electrolytic solution of zinc chloride and passing an electric current through it.
• The current passage causes the zinc to adhere to the surface of the steel sheet and coat it.

Painting

• Non-metallic coatings such as paint form a film that protects and embellishes the alloy when it dries (Pintro).

Cut and Finish

• The production process ends with the cut or form into rolls, sheets, and strips of rectangular, square, circular, and triangular designs, among others.
• In addition, surface finishes and other treatments can be applied for specific uses.

The main coating types used by Ternium are:

Zintro: The steel sheet is subjected to galvanizing, a hot-dip process to add a layer of zinc to prevent corrosion. As it is a high-resistant and economic option, it is commonly used in precarious and rural environments.

Zintro Alum: The steel piece is coated with zinc and aluminum to combine the properties of both metals in a sheet capable of resisting six times more corrosion than the normal galvanizing, as well as reflecting heat. It is used in industrial units and facades.

Pintro: After galvanizing, the sheet is coated with paint on one or both sides. In addition to extending the life of the sheet and maintaining the room temperature, this coating offers an aesthetic finish ideal for white goods and architectural applications.