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Sheet metal surface treatment
Sheet metal surface treatment refers to the process of applying a protective
coating or finishing treatment to the surface of sheet metal to enhance its 
appearance, durability, and corrosion resistance.
CNCT can provide sheet metal surface treatment methods include:
Benefits of Painting at CNCT Manufacturing
>  CNCT uses paint coating to BS EN ISO12944-2, C3 specification
>  Surface preparation: Clean metal to AS 1627.1 then abrasive blast all surfaces U.N.O to AS 1627.4 CLASS 3 profile min. 75µm.
>  Primer: Epoxy zinc rich primer, min. 60µm DFT
>  Build Coat: High solids epoxy micaceous iron oxide 2 coats min. TOTAL DFT 175µm
>  Top coat: 2 pack polyurethane, MIN. 75µm DFT
Benefits of Powder Coating at CNCT Manufacturing
Powder coating: Electrostatically applying a dry powder to the sheet metal surface, which is then cured through heat to form a durable and protective coating.
>  The most up-to-date & environmentally friendly pre-treatment which enables us to achieve minimum 1000 hour salt test
>  All batches will undergo adhesion sampling testing to ensure compliance
>  Flexible 24 hour shift coverage to achieve first class delivery
>  Partners with major powder companies to help us achieve the best prices
>  ISO 9001 and TS 14001 Certified
Benefits of Galvanizing at CNCT Manufacturing
Galvanizing: Immersing the sheet metal in a bath of molten zinc to form a protective zinc coating, which provides excellent corrosion resistance.
>  Before hot-dip galvanizing, the surface treatment of the components must be done to ensure the cleanliness of the metal surface.
>  The product should be flat and smooth, free from dripping tumors, roughness, and zinc thorns, no molting, and no residual solution residue.
>  The average total weight of the zinc layer should not be less than 610g/m, and the average thickness should not be less than 85m
>  The quality and standards after hot-dip galvanizing should comply with the provisions of GB/T13912-2002
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These are just some of the commonly used sheet metal surface treatment methods. The choice of treatment depends on the desired outcome, application, and material of the sheet metal, We will provide you with professional advice.
What is powder coating and powder coating process?​​​​​​​
Powder coating is a surface finishing process commonly used on sheet metal and other metal substrates. It involves applying a dry, powdered paint or coating to the surface, which is then cured under heat to create a smooth, durable, and protective finish.

1.Preparation: The sheet metal surface is cleaned and pre-treated to remove any dirt, grease, rust, or other contaminants.

2.Powder application: The powdered coating material, which consists of a blend of pigment, resin, and other additives, is electrostatically charged and sprayed onto the sheet metal surface.

3.Curing: After the powder is applied, the sheet metal is cured at high temperatures in a specialized oven or curing equipment.

4.Cooling and inspection: Once the curing process is complete, the sheet metal is cooled and inspected for any defects, such as bubbles, runs, or uneven coating.

5.Powder coating offers several advantages over traditional liquid coatings:

6.Durability: Powder coatings provide a robust finish that is resistant to chipping, scratching, fading, and corrosion.

7.Environmentally friendly: Powder coating is a solvent-free process, which means it produces fewer volatile organic compounds (VOCs) compared to liquid coatings. This makes it a more environmentally friendly option.

8.Aesthetics: Powder coatings are available in a wide range of colors, textures, and finishes, allowing for customization and achieving desired aesthetics.

9.Efficiency: Powder coating is an efficient process since the overspray can be collected and reused, reducing waste.

Powder coating is widely used in various industries, including automotive, appliance manufacturing, architecture, furniture, and many others, due to its durability, aesthetics, and environmental benefits.​​​​​​​
What is sheet metal painting​​​​​​​?
Sheet metal painting is the process of applying a layer of paint or coating to the surface of sheet metal to enhance its appearance, protect it from corrosion, and provide a durable finish. It involves several steps, including surface preparation, primer application, paint application, and protective coating.

1.Surface preparation: The sheet metal surface is cleaned to remove any dirt, grease, rust, or other contaminants.

2.Primer application: A primer is applied to the sheet metal surface after it has been properly prepared. The primer serves as a bonding agent between the base metal and the paint layer.

3.Paint application: Once the primer has dried, multiple layers of paint are applied to the sheet metal surface. The choice of paint can depend on factors such as desired color, finish, and the intended use of the sheet metal.

Protective coating: To enhance the durability and longevity of the paint finish, a protective coating can be applied over the paint layer. This could be a clear lacquer, topcoat, or clear coat.​​​​​​​
What is galvanizing process?​​​​​​​
Galvanizing is a process that involves coating steel or iron with a layer of zinc to protect it from corrosion. The zinc coating acts as a sacrificial barrier, preventing the underlying metal from coming into direct contact with corrosive elements in the environment.

1.Surface Preparation: The steel or iron surface is cleaned to remove any dirt, grease, and mill scale.

2.Pre-fluxing: The metal may undergo a pre-fluxing step, especially when hot-dip galvanizing is employed.

3.Galvanizing: The cleaned metal is immersed in a bath of molten zinc. The temperature of the zinc bath typically ranges from 440 to 460 degrees Celsius (824 to 860 degrees Fahrenheit).

4.Metallurgical Reaction: When the metal is dipped into the molten zinc, a metallurgical reaction known as galvanic or electrochemical reaction occurs.

5.Cooling and Quenching: After the metal is withdrawn from the zinc bath, it is allowed to cool naturally or is quenched in water.

The galvanized coating offers multiple advantages:

1.Corrosion Protection: The zinc coating acts as a barrier, protecting the underlying metal from corrosion caused by moisture, oxygen, and other environmental factors.

2.Durability: Galvanized coatings provide long-lasting protection to steel or iron structures, even in harsh environments.

Cost-effectiveness: Galvanizing offers a cost-effective solution for corrosion protection compared to other coatings or methods.

Galvanizing finds applications in various industries, including construction, automotive, agriculture, infrastructure, and marine, where the durability and corrosion resistance of steel or iron are essential.
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We work with businesses in a wide variety of sectors with
capabilities to offer short and long runs of metal
CNCT metalwork is a member of YOCO international. CNCT have been in metalwork in China since 2007.
Contact Us
  Pengjiang Section, Jiangmen 
City, Guangdong Province, China
  +86-750-3162699
+86 13536034040 (Echo liu)

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