APPLICATIONS AND FINISHES

FM Metal Fasteners S.p.A. offers specialized surface treatment services for fasteners,
ensuring corrosion resistance, long-lasting durability, and optimal performance for every industrial application.

Our experience and expertise allow us to provide tailored solutions, combining quality and innovation.

Surface Treatments for Fasteners

Protection and Quality

In the field of screws and bolts, surface treatments play a crucial role in ensuring corrosion resistance, enhancing appearance, and optimizing fastener performance. Our Group offers a complete range of surface treatment processes, designed to meet the specific needs of every industrial sector.

Our Process
Each stage of the surface treatment process—from initial preparation to immersion and coating deposition—is carefully monitored to ensure excellent results.

Rely on our expertise to achieve fasteners with top-level performance in terms of protection and durability.

Our Expertise
Carbon steels and alloy steels offer excellent mechanical properties but have a strong tendency to react with atmospheric elements, particularly oxides and salts present in the air.

Without proper protection, any product made from these materials is prone to chemical attack, quickly becoming covered in rust.

As this process progresses, it leads to complete corrosion of the product and the total loss of its functionality.

FM Metal Fasteners Group S.p.A. is able to provide a wide range of protective surface coatings compliant with RoHS3 (EU Directive 2015/863).

PROTECTIVE COATINGS

Protection against corrosion and wear.

Zinc and Zinc-Nickel Electroplated Coatings
ISO 4042 – ISO 2081 – Major Automotive Standards

These coatings are applied through an electroplating process in which a layer of zinc or zinc-nickel alloy is deposited onto metal components to provide corrosion protection.

Excellent corrosion resistance, even in harsh environments
Zinc-nickel further enhances resistance under high temperatures and in the presence of salts
Ideal for applications in the automotive and mechanical industries

Zinc Flake Coatings – GEOMET® / DELTAPROTEKT®
ISO 10683 – Major Automotive Standards – Industry-Specific Specifications

Zinc flake coatings (GEOMET® or DELTAPROTEKT®) are composed of thin layers of zinc and zinc-based alloys. Their lamellar structure offers outstanding corrosion protection without affecting component dimensions.

High corrosion resistance in aggressive environments (e.g., chloride exposure)
Suitable for screws, bolts, nuts, and other fastening parts
Complies with environmental standards (free from hexavalent chromium)
Widely used in the automotive industry and for components requiring long durability and weather resistance

Hot-Dip Galvanized Zinc Coatings
ISO 10684 – ASTM A153 – ISO 1461

Hot-dip galvanizing involves immersing components in a bath of molten zinc, creating a thicker and more robust coating compared to electroplating. This treatment is particularly effective for corrosion protection in outdoor and industrial environments.

Excellent long-term corrosion protection
High resistance to impact and abrasion due to coating thickness
Suitable for highly aggressive environments (e.g., chemical industry, construction, metal structures)
Frequently used in automotive and construction applications