Black Powder Coating

2024-08-27 by Cherry

Black powder coating is a coating that is made by 

spraying powder coating evenly on the metal surface

and baking it at high temperature to melt and solidify

the powder particles into a hard, flat, beautiful, and

protective coating. 

This coating has excellent corrosion resistance, 

wear resistance, weather resistance, and

decorative properties, strong adhesion, not easy to

peel off, smooth surface, bright and lasting color.

As an important part of modern surface treatment 

technology, black powder coating plays a key role

in die-casting machine manufacturing and related

fields. 

This article will discuss in detail the specific

application and importance of black powder coating

in the field of die-casting machines. 

We will conduct an in-depth analysis of the

aspects of process principles, application scenarios,

technical advantages, typical cases, process flow, etc.

to help readers fully understand the potential of

this technology.

Overview of the black powder coating process

Black powder coating is a technology that forms a uniform

coating on the metal surface by electrostatic spraying and

thermal curing. 

Compared with traditional liquid coatings, powder coating

does not contain organic solvents, is more environmentally

friendly, and can provide excellent corrosion resistance,

wear resistance and aesthetic effects.

Its black coating has high hiding power and UV resistance,

making it an ideal choice for die-casting machine parts.

Application scenarios of black powder coating in die-casting

machines

In the field of die-casting machines, black powder coating 

is mainly used to improve the durability and protection of

die-casting parts. 

The following are several main application scenarios:

1. Surface treatment of die-casting molds: Die-casting molds

are core components working under high temperatures and 

high pressure? 

The mold surface's wear and corrosion resistance directly

affects the mold life and the quality of die-casting products.

Black powder coating can effectively reduce oxidation

and wear of the mold surface, and improve the service

life and production efficiency of the mold.

2. Die-casting machine frame and housing: The frame and

the die-casting machine's housing must withstand strong

mechanical stress and complex working environment during

the production process. 

The black powder coating not only enhances its corrosion

resistance, but also provides a good appearance effect,

making the equipment easier to clean and maintain.

3. Coating of die-casting parts: Aluminum alloys, magnesium

alloys and other metal materials are widely used in die-casting

machine manufacturing. 

These materials are prone to corrosion, wear, and other 

problems in long-term use.

The black powder coating can

form a dense protective layer on the surface of parts,

effectively improving their durability and reliability.

Technical advantages of black powder coating

1. Excellent corrosion resistance and wear resistance:

The working environment of the die-casting machine is 

complex and faces erosion from high temperature, moisture,

and chemicals. 

The protective layer formed by the black powder coating

is dense and uniform, which can effectively

prevent moisture from corroding the surface of the alloy

casting, providing a protective barrier, which can significantly

improve the corrosion resistance and wear resistance of the

die-casting machine components and extend the service life,

which is essential for maintaining the long-term stable

operation of the die-casting machine.

2. Environmental protection and economy: The black powder

coating does not contain volatile organic compounds (VOCs)

and does not produce harmful gas emissions during the

spraying process, which meets environmental protection

standards and modern industrial requirements for green

production. 

At the same time, the utilization rate of powder coating

is high, usually reaching more than 95%, which is much

higher than traditional solvent-based coatings,

reducing material waste and costs.

At the same time, the coating process is highly automated,

which improves production efficiency.

Although the initial investment may be high, considering

the high utilization rate, low maintenance cost and

long-term excellent coating performance of powder coating,

its overall economy is good.

3. Efficient production process: The black powder coating

process is simple, and no grinding or multiple spraying

processes are required after coating and the ideal effect

can be achieved in one film formation.

This high efficiency is particularly suitable for the needs

of mass production of die-casting machines.

4. Excellent decorative effect: Black powder coating has good

covering power and uniform color. It is not only practical 

but also decorative. 

It can provide a beautiful appearance for die-casting

machines and their parts. It can meet the

needs of some military applications and the construction 

and furniture industries for the appearance of die-casting

machines and enhance the market competitiveness of products.

Fourth, typical case: Application of black powder coating

in a well-known die-casting machine factory

Take LK, a well-known die-casting machine manufacturer,

as an example. LK Company widely uses black powder coating

technology in the production process and has achieved 

remarkable results. The specific cases are as follows:

1. Extended mold life: After the factory applied black

powder coating to the mold surface, the wear resistance

and corrosion resistance of the mold was significantly

improved, the service life was extended by 30%, and

the downtime caused by mold damage was reduced.

2. Improved protection effect of parts: After applying

black powder coating on the parts of the die-casting

machine, the corrosion resistance time of the product

in the salt spray test was extended by 50%, which provided

a reliable guarantee for the stable operation of the 

equipment in harsh environments.

3. Reduced production costs: By adopting powder coating

technology, the company has reduced production waste and

post-maintenance costs while reducing VOC emissions, 

thereby improving overall economic benefits.

V. Black powder coating process

The process of black powder coating includes the following

steps:

1. Surface pretreatment: Degreasing, rust removal, phosphating,

and other surface treatments are performed on die-cast parts

to ensure coating adhesion.

2. Electrostatic spraying: Electrostatic spraying equipment

is used to evenly spray black powder on the surface of the

workpiece. The powder is adsorbed on the metal surface under

the action of static electricity to form a uniform coating.

3. High-temperature curing: The sprayed workpiece is sent 

to the curing furnace and cured at a high temperature of 

180-200°C to form a dense and strong coating.

Cooling test: After curing, the workpiece is cooled, and 

quality tests such as coating thickness, adhesion, and wear

resistance is performed to ensure that the coating meets

the requirements.

3.

4.

Packaging and shipment: The workpieces that have passed

the inspection are packaged and prepared for shipment.

5.

VI. Future Outlook

With the continuous development of industrial manufacturing,

the application prospects of black powder coating in the

field of die-casting machines is broad. 

In the future, with the improvement of environmental

protection requirements and the advancement of technology,

the black powder coating process will be applied in more 

fields and further optimize production efficiency and cost. 

At the same time, die-casting machine manufacturers will pay 

more attention to environmental protection, durability, and

economy when choosing surface treatment technology, which

also provides strong support for the development of black

powder coating.

VII. Conclusion

As a mature and efficient surface treatment technology, 

black powder coating has shown great potential in the field

of die-casting machines. Its excellent protective performance,

environmental advantages and economic benefits make it an 

indispensable part of die-casting machine manufacturing.

Through continuous optimization and innovation, black powder

coating technology will further enhance the quality and market

competitiveness of die-casting machines and contribute to the

development of the industry.

I hope this article can provide a valuable reference for 

die-casting machine manufacturers and technicians, and also

bring inspiration to readers who are concerned about black

powder coating technology. If you have more needs or questions

about black powder coating or die-casting machines, please 

feel free to contact relevant professionals for help.

For more info, you can refer to: 

https://www.tiktok.com/@lk_diecastingmachine/video/7405113006880820522 

https://www.youtube.com/shorts/JLX410QV_kw

To learn further info about Die Casting Machines,

pls contact LK Die Casting Machine Authorized Official Agent

LK OFFICIAL AGENT OFFICE DCM

LK Die Casting Machine Authorized Official Agent for Egypt(EGY)

Saudi Arabia(ksa)

United Arab Emirates(UAE)

The Islamic Republic of Iran(Iran)

Qatar(QAT)

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The Middle East

Address: 1. Industry Zone, South of Port Said Kebly, Cairo, Egypt

      2. EX 14., EASTERN RING ROAD, AI RAYAN DISTRICT,

         RIYADH, SAUDI ARABIA

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Phone/WhatsApp/Wechat: 0086 13598704163

Mobile: +20 101 304 3317      +20 150 181 8310

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