Surface treatments in Industrial Fasteners and Fixings:

A Guide to Enhancing Durability and Performance

Welcome back to the SNK System blog. In this edition, we will explore how surface treatments in industrial fasteners and fixings enhance their protection and performance.

As specialists in fastening elements and surface treatments, we will guide you through the importance of these processes in various industries and applications.

The Importance of Surface Treatments in Industrial Fasteners and Fixings

In the fastener and fixing industry, surface treatments are essential to enhance corrosion resistance, electrical conductivity, appearance, and wear resistance.

These processes extend the lifespan of screws, nuts, and bolts, ensuring optimal performance in different environments.

Tipos de tratamientos superficiales

Common surface treatments applied to screws, nuts, and bolts include:


Nickel Plating


Chrome Plating

Powder Coating


Each treatment offers specific advantages, such as increased corrosion resistance, improved electrical conductivity, or a more attractive appearance.

Surface treatments in industrial fasteners and fixings: Galvanizing vs. Zinc-Nickel

Next, we present a comparison between two popular surface treatments applied to screws, nuts, and bolts: galvanizing and zinc-nickel plating.


It offers excellent corrosion resistance and is widely used in the construction and automotive industries. However, its corrosion resistance in extremely corrosive environments may be limited compared to zinc-nickel.


Zinc-Nickel plating provides greater corrosion resistance, particularly in extremely corrosive or high-temperature environments. Additionally, it offers higher resistance to wear and fatigue.

When choosing between galvanizing and zinc-nickel plating, it is important to consider the working conditions, cost, and desired properties for the fasteners.

TREATMENT Galvanizing






Criteria for selecting the type of surface treatment

To choose the appropriate surface treatment, factors to consider include:

Work environment

Materials involved

Corrosion resistance requirements

Appearance and aesthetics

Cost and durability

Applications in industrial fasteners and fixings in various industries

Surface treatments in screws, nuts, and bolts are essential in various industries such as:


Corrosion resistance, wear resistance, and aesthetics


Corrosion resistance, extreme temperature resistance, and harsh environment resistance.


Corrosion resistance and durability.


Electrical conductivity and corrosion resistance.

Food industry

Corrosion resistance and compliance with sanitary regulations.

Application process

Surface treatments are applied through immersion, spraying, or electrodeposition. Proper surface preparation is crucial to achieve optimal results.

In addition, conducting quality controls and tests is important to ensure the effectiveness of the treatment.

Regulations and standards

It is crucial to comply with standards and technical specifications (ISO, ASTM, DIN, ASME) in surface treatments to ensure quality, consistency, and safety.


Surface treatments in industrial fasteners and fixings play a crucial role in enhancing protection and improving performance in various applications. By selecting the appropriate surface treatment, it is possible to ensure a longer lifespan and optimal performance in screws, nuts, and bolts.

As innovations and developments in this field continue, we can expect to see further improvements in the quality and durability of fasteners and their surface treatments.