Black Chromate

2024-07-30 By Cherry  

Introduction

Black chromate is a chemical treatment method widely used on metal surfaces, especially in zn al alloys and cast aluminum and

aluminum products.

This treatment method has a significant effect in improving the corrosion resistance, aesthetics, and service life of the material.

This article will detail the application, advantages, relevant standards, and specific use of black chromate in different fields.

Introduction to Black Chromate

Black chromate is a surface treatment technology that forms a black oxide film on the metal surface through a chemical reaction.

This film not only effectively prevents oxidation and corrosion, but also increases the aesthetics of the metal.

Black chromate is commonly used in metal materials such as zinc-aluminum alloys, cast aluminum, and aluminum, and is widely used in

automotive die-casting, medial surface treatment, and other fields.

Application of Black Chromate in Zn al Alloy

Zn al alloys are widely used in various industrial products due to their excellent mechanical properties and casting properties.

Black chromate treatment can significantly improve the corrosion resistance of zinc-aluminum alloys, making them perform well in harsh

environments. In addition, this treatment method can enhance the decorative effect of zinc-aluminum alloys and increase the market

competitiveness of products.

Difference between Cast Aluminum and Aluminum

The main difference between cast aluminum and aluminum lies in their manufacturing process and performance.

Cast aluminum is formed by melting aluminum alloy at high temperatures and then casting it. It has complex shapes and high strength.

Aluminum is formed by extrusion, rolling, and other processes, and is mainly used to make thin plates, profiles, etc.

Black chromate treatment is used in both cast aluminum and aluminum products, which can effectively improve their surface properties.

AS 383 standard

AS 383 is a standard for metal surface treatment, covering the technical requirements and test methods for black chromate treatment.

Following this standard for treatment can ensure that the product has consistent quality and performance to meet market demand.

What is a die wall?

The die casting wall refers to the distance from the outside to the inside of the die casting. It is an important factor affecting the

strength, heat dissipation, and processing difficulty of the die casting. Reasonable design of the die casting wall thickness can optimize

the performance of the casting and reduce production costs.

Casting design considerations

When designing a casting, factors such as material selection, casting structure, pouring system, and cooling system need to be considered.

Black chromate treatment can be used as part of the design to improve the surface performance and durability of the casting.

High casting

High casting is a process commonly used to produce high-precision, complex-shaped metal parts.

Black chromate treatment can further improve the surface quality and corrosion resistance of high-pressure castings and is widely used

in high-end manufacturing fields such as automobiles and aviation.

Nickel coating with gold finish

The nickel coating with gold finish is a process of electroplating a layer of nickel and gold on the metal surface, which can significantly improve

the corrosion resistance and aesthetics of the metal.

Black chromate treatment and nickel coating with gold finish can be used in combination to enhance the performance of the metal surface further.

Application in automotive die casting

Black chromate treatment is widely used in automotive die casting, which can effectively improve corrosion resistance and service

life of automotive parts and reduce maintenance costs. In addition, this treatment can also improve the appearance of parts and improve

the market competitiveness of the whole vehicle.

Casting porosity

Casting porosity is one of the important indicators to measure the quality of castings, which refers to the proportion of pores or voids

present in the casting. High porosity will reduce the mechanical properties and service life of the casting. Optimizing the casting

process and surface treatment, such as black chromate treatment, the casting porosity can be effectively reduced.

Density of brass (lb/in³)

The density of brass is about 0.303 lb/in³ (8.4 g/cm³). Black chromate treatment can be applied to brass products to improve their

corrosion resistance and decorative effect.

Application of aluminum alloys

Aluminum alloys are widely used in aviation, automobiles, construction, and other fields due to their advantages such as being lightweight,

high strength and corrosion resistance.

Black chromate treatment can further enhance the surface properties of aluminum alloys and extend their service life.

Medical surface treatment

In the manufacture of medical devices, black chromate treatment can improve the antibacterial and corrosion resistance of the metal surface,

ensuring the safety and reliability of medical devices.

What temp does cast aluminum melt?

The melting point of cast aluminum is usually between 615-660 degrees Celsius, depending on the aluminum alloy composition used.

Cast aluminum with a lower melting point is easier to cast and suitable for the production of parts with complex shapes.

Aluminum advantages

Aluminum advantages are lightweight, high strength, corrosion resistance, good electrical and thermal conductivity, and

is widely used in various industries. Black chromate treatment can further enhance the surface properties and durability of aluminum products.

Aluminum Alloy Manufacturer LK

Aluminum Alloy Manufacturer LK Group has more than 40 years of experience in R&D and production of die-casting machines and has obtained

more than 300 patents. 

LK possesses a market share of more than 50% in the die-casting machine industry.

LK produces a variety of high-performance aluminum alloy materials and provides surface treatment services such as black chromate treatment

to meet the diverse needs of customers.

Does aluminum contain lead?

Aluminum itself does not contain lead, but a small amount of lead may be added to some aluminum alloys to improve its processing performance.

In order to ensure the environmental protection and safety of the product, the lead content needs to be strictly controlled.

Screw-machining steel

Screw-machining steel is a steel specially used for manufacturing screws, with good cutting performance and strength.

Black chromate treatment can be applied to screw-processing steel to improve its corrosion resistance and surface quality.

Conclusion

As an efficient surface treatment method, black chromate is widely used in metal materials such as zinc-aluminum alloy, cast aluminum

and aluminum. By reasonably applying this treatment method, the performance and market competitiveness of metal products can be

significantly improved.

In the design and manufacturing process, combined with black chromate treatment, it can effectively solve the actual needs of users and

improve product quality and service life.

I hope this article can provide you with valuable information to help you better understand and apply black chromate treatment technology.

For more info, you can refer to: https://www.youtube.com/shorts/JLX410QV_kw

Contact LK Egypt to learn more info about the die-casting machine

LK AGENT OFFICE DCM

Address: Industry Zone, South of Port Said Kebly, Egypt

https://www.zazdiecasting.com/

Phone/WhatsApp/Wechat: +86 13598704163

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

Email: jack@zazmae.com      ahmedmahmoud@zazmae.com