Dacromet 320

Dacromet 320 Coated Fasteners Manufacturer in India

Dacromet® is a zinc and aluminum flake coating, typically applied using an inorganic chromic acid solution as a Binder. Overlapping Zinc & Aluminum flakes provides excellent barrier, Thus use of Dacromet® coated Nut Bolts is considered to be ideal for applications that have high corrosion resistance requirements. Dacromet® coated screws is that the coating exhibits good heat resistance while offering a low friction coefficient.

The danger of hydrogen embrittlement does not exist. The Dacromet® coating process takes place in an aqueous media, where the application of the layer takes place with the dispersion of chromate zinc flakes in an aqueous dip-spin process. The coated layer is then dried, followed by subsequent burning at a temperature of 300 °C.

The Dacromet® Coated Fasteners also exhibit superior resistance to mechanical damage.

Dacromet® 500 also has a Self lubricant.

What is Dacromet 320 Coating?

Dacromet 320 is an inorganic zinc-aluminum flake coating system that protects steel fasteners through multiple protective layers. The coating is applied using a dip-spin or spray process and then cured at high temperatures, creating a durable protective film with excellent corrosion resistance.

Unlike traditional zinc plating, Dacromet does not rely on electroplating, making it especially suitable for high-strength bolts where hydrogen embrittlement can become a concern.

Why Choose Dacromet 320 Fasteners?

Superior Salt Spray Resistance
No Hydrogen Embrittlement
Zinc-Aluminum Flake Technology
Heat Resistant Performance
Excellent Thread Accuracy
Longer Service Life

Dacromet 320 Coating Process for Fasteners

Our Electro Zinc Plated Fasteners undergo a controlled plating process to ensure consistent coating quality and excellent surface finish.

1 Surface Preparation

Fasteners are thoroughly cleaned to remove oils, grease and contaminants.

2 Shot Blasting or Cleaning

The surface is prepared to achieve proper coating adhesion.

3

Dacromet Coating Application

The zinc-aluminum coating is applied using a dip-spin or spray process, ensuring uniform coverage even on complex fastener shapes.

4

Centrifuging

Small fasteners are spun to remove excess coating and maintain accurate thread dimensions.

5

Heat Curing

The coated fasteners are baked at controlled temperatures to cure the coating and develop its protective properties.

6

Inspection

Each batch undergoes quality inspection for coating consistency, thread compatibility and surface finish.

Dacromet 320 vs Conventional Zinc Plating

Feature	Dacromet 320	Electro Zinc
Coating Type	Zinc-Aluminum Flake	Electroplated Zinc
Hydrogen Embrittlement	No	Possible
Salt Spray Resistance	Excellent	Moderate
Heat Resistance	High	Moderate
Thread Accuracy	Excellent	Excellent
High Strength Bolts	Ideal	Limited

This comparison makes Dacromet an excellent choice for demanding industrial applications.

Benefits of Dacromet 320 Fasteners

Exceptional Corrosion Protection

Performs well in harsh industrial and outdoor environments.

No Hydrogen Embrittlement

Suitable for high-tensile bolts because it avoids electroplating-related risks.

Heat Resistant

Maintains performance under elevated temperatures in many industrial uses.

Uniform Coating

Provides consistent coverage while preserving thread performance.

Long Service Life

Designed for durable performance in demanding applications.

Modern Protective Technology

Widely used for demanding industrial and automotive applications.

Products Range

We manufacture and supply:

Available Standards

Material Grades

Electro Zinc Plated Fasteners are widely used across multiple industries where appearance, precision and moderate corrosion resistance are required.

Technical Specifications

Parameter	Specification
Coating Type	Zinc-Aluminum Flake
Process	Dip-Spin
Finish	Silver Grey
Protection	High Corrosion Resistance
Thread Accuracy	Excellent
Heat Resistance	High
Standards	High Strength Fasteners

Important Note: Threaded HDG fasteners often require properly matched galvanized nuts because the zinc coating increases thread thickness. Oversized tapped nuts are commonly used for proper assembly.

Applications of Dacromet 320

Dacromet 320 Fasteners are widely used in industries requiring high corrosion resistance and reliable mechanical performance.

Automotive Industry

Suspension Systems
Chassis Components
Brake Assemblies
Engine Fasteners

Railway Industry

Track Equipment
Structural Assemblies
Railway Hardware

Renewable Energy

Wind Turbines
Solar Mounting Systems

Heavy Engineering

Industrial Machinery
Mining Equipment
Construction Equipment

Infrastructure

Steel Structures
Bridges
Outdoor Industrial Installations

Frequently Asked Questions

1. What is Dacromet 320 coating?

Dacromet 320 is a zinc-aluminum flake coating that provides excellent corrosion resistance without hydrogen embrittlement.

2. Why is Dacromet better for high-strength bolts?

Because it is a non-electrolytic coating, it helps avoid hydrogen embrittlement associated with some electroplating processes.

3. What is the difference between Dacromet and Hot Dip Galvanizing?

Dacromet provides a thin zinc-aluminum flake coating with excellent thread accuracy, while Hot Dip Galvanizing produces a thicker zinc coating for structural outdoor applications.

4. Which industries use Dacromet-coated fasteners?

Automotive, railway, wind energy, heavy engineering and construction industries commonly use Dacromet-coated fasteners.

5. Can Dacromet-coated fasteners be customized?

Yes, BRK Industries manufactures customized sizes and specifications for industrial applications.

6. Are Dacromet fasteners suitable for export?

Yes, they are manufactured according to international standards and supplied to global industrial markets.

BRK INDUSTRIES