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How Much Do You Know About Different Surfaces of Structural Pipe Fittings?

How Much Do You Know About Different Surfaces of Structural Pipe Fittings?

February 11, 2025

Hulk Metal's structural pipe fittings offer a diverse range of surface treatments for customers to choose from. Whether it's for corrosion resistance in a harsh industrial environment or for achieving an aesthetically pleasing finish in a decorative project, customers can select the most suitable option according to their specific requirements. This allows for maximum customization, ensuring that the pipe clamp fittings not only meet functional needs but also match the overall design and usage scenarios.

Come here to learn more about the different surfaces of structural pipe fittings. 

Raw Black

After the structural pipe fittings are processed, they will be treated with anti-rust oil, and their surface will appear metallic black, which is called raw black.

Advantages

It is the cheapest of the four surface treatments.

It has more possibilities for custom processing, and you can spray your favorite color on the pipe or perform other surface treatments.

In a dry environment, it can also prevent rust for a long time.

Note

Because there is anti-rust oil on the surface of the structural pipe fittings, please wear gloves when using it.

When used in a non-dry environment, it is easy to rust. The chemical reaction formula is:

4Fe + 3O2 + XH2O = 2Fe2O3·XH2O

Before surface treatment, be sure to clean the anti-rust oil on the surface and ensure that the surface of the structural pipe fittings is dry and free of debris.

If the raw black structural pipe fittings are exposed to the air, please make sure to store them in a dry environment.

Recommended storage method: Use thick plastic bags to cover all structural pipe fittings and put desiccant in them. This way it can be stored for a long time.

Application

Can be used to build a variety of three-dimensional structures and fences.

Hot-dip Galvanized

After the structural pipe fitting is processed, it will be hot-dip galvanized. Its surface will show the metallic silver color of zinc. When exposed to the air, its surface zinc coating will react with the oxygen in the air to form a dense zinc oxide protective layer, thereby protecting the internal structure of the structural pipe fitting.

The reaction chemical formula of the coating in the air: 2 Zn + O2 → 2 ZnO

Advantages

This is the most commonly used surface treatment for structural pipe fittings and can be used in more complex environments.

It can be stored for a longer time.

It can have a longer service life in normal outdoor environments.

It is cheaper than double coating and powder coating.

Note

Please do not use in acidic and strong alkaline environments. The coating will be corroded and shorten the life of the structural pipe fittings. In severe cases, it may even affect the structural strength:

Under acidic conditions:  ZnO + 2 H+ → Zn2+ + H2O

Under alkaline conditions:  ZnO + 2OH−+ H2O → [Zn(OH)4]2-

Application

Build various guardrails, fences, etc.

Build outdoor amusement facilities, brackets, tents and other three-dimensional structures.

Build mobile workbenches, bookshelves, tables, chairs and other DIY structures.

There are more uses waiting to be developed.

Double Galvanized

The structural pipe fittings is electro-galvanized after hot-dip galvanizing. Its surface is bright silver and very beautiful. Other effects are similar to the hot-dip galvanized structural pipe fittings.

Advantages

Very beautiful.

This is one of the most commonly used surface treatments for structural pipe fittings and can be used in more complex environments.

It can be stored for a longer time.

It can have a longer service life in normal outdoor environments.

It is usually used indoors and is usually chosen when customers have requirements for both rust prevention and aesthetics.

Note

Please do not use in acidic and strong alkaline environments. The coating will be corroded and shorten the life of the structural pipe fittings. In severe cases, it may even affect the structural strength:

Under acidic conditions: ZnO + 2 H+ → Zn2+ + H2O

Under alkaline conditions: ZnO + 2OH−+ H2O → [Zn(OH)4]2-

Application

Build various guardrails, fences, etc.

Build outdoor amusement facilities, brackets, tents and other three-dimensional structures.

Build mobile workbenches, bookshelves, tables, chairs and other DIY structures.

There are more uses waiting to be developed.

Powder Coating

Structural pipe fittings are powder coated after hot dip galvanizing. Powder color can be customized.

Advantages

The structural pipe fittings can have more optional colors.

It can be matched with powder-coated pipes to design a more beautiful structure.

It can be stored for a longer time.

It can have a longer service life in normal outdoor environments.

It can be used in acidic and alkaline environments.

Note

The structural pipe fitting with powder coating is not a regular product.

Color customization supports the selection of color numbers on the Pantone color card or the RAL color card, and there may be color differences.

It has MOQ requirements when placing an order.

Please consult our sales staff for details. 

Application

Build various guardrails, fences, etc.

Build outdoor amusement facilities, brackets, tents and other three-dimensional structures.

Build mobile workbenches, bookshelves, tables, chairs and other DIY structures.

There are more uses waiting to be developed.


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