Corrosion Control Strategies: How alloy technologies enhance protection

Cedric Olivier

June 18, 2024

June 18, 2024

Corrosion, the nemesis of countless industries, wreaks havoc on everything from pipelines to car parts. Thankfully, a diverse arsenal of strategies exists to combat this destructive process.

This blog deepens into the critical role of alloy technologies in enhancing corrosion protection measures.

Corrosion Control Toolbox

Industries employ various strategies to manage corrosion, including:

  • Material Selection: Choosing the right material for the job is crucial. Alloy technologies come into play here, offering a vast array of material options with enhanced corrosion resistance.

  • Surface Preparation: A clean slate is essential! Cleaning metal removes contaminants like dirt, grease, and previous treatments that can hinder the effectiveness of downstream protection methods.

  • Trivalent Passivation: This invisible shield strengthens your metal's defense. Passivation creates a thin oxide layer on the surface, significantly enhancing corrosion resistance without compromising the metal's properties.

  • Plating Bath Technologies: Zn-Ni and Zn-Fe alloy coatings offer excellent protection as physical barriers.

  • Topcoats: Think of these as the ultimate shield. Topcoats provide a robust physical barrier, offering superior protection against wear, harsh environments, and UV damage.

How Specific Alloys Combat Corrosion

The magic of alloys lies in combining different elements to create a material with superior properties, including enhanced corrosion resistance. Specific alloy compositions excel in various environments:

  • Stainless Steels: The addition of chromium to steel creates a passive oxide layer that shields the underlying metal from corrosion.

  • Nickel Alloys: Highly resistant to harsh environments, nickel alloys are often used in marine and chemical processing applications.

  • Aluminum Alloys: Adding elements like copper or magnesium to aluminum significantly improves its corrosion resistance.

How Alloy Coatings work?

Alloy coatings offer superior protection compared to pure zinc or other coatings. This is because their electrode potential falls between that of iron (the base metal) and zinc. This "sacrificial protection" allows the coating to corrode preferentially, safeguarding the underlying metal. Adding a passivation layer and a topcoat further enhances the protective capabilities of these alloy coatings.

Selecting the right alloy for an application is crucial. Factors like the specific corrosive environment, mechanical strength requirements, and cost all play a role. Understanding these factors ensures optimal corrosion control effectiveness.

Advancements in Alloy Technologies

The world of alloy development is constantly evolving. High-performance alloys like nickel-chromium-iron (Ni-Cr-Fe) alloys offer exceptional resistance to high temperatures and corrosive environments. Additionally, research in nanoalloys explores how manipulating materials at the atomic level can further enhance corrosion protection.

On the electroplating side, ZnNi deposits are being used in several industries due to their corrosion resistance. What started as a 5-9% Ni alloy has turned into a 12-16% Ni alloy extending service life of steel components. As the world uses more light metals to manufacture high-tech durable goods, it is imperative that galvanic interactions between junctions be kept to a minimum. This is where ZnNi electroplating has found excellent properties vs. Zn, Zn flake, and other widespread technologies.

Unleash the full potential of your metal assets

The fight against corrosion demands a strategic approach, and PAVCO empowers you to emerge victorious. We offer an extensive line of metal finishing solutions, meticulously designed to maximize the protective capabilities of your metal components.

Pavco provides a comprehensive line of high-performance trivalent passivates and sealers to provide the building blocks to create a customized protection system.

Don't settle for anything less than the ultimate protection. Contact us and discover how we can help you achieve a perfect finish that not only looks stunning, but also delivers unmatched durability and long-lasting performance for your metal project.



We’re a developer and supplier of chemistries for the metal finishing industry since 1948.

In PAVCO, we develop products and deliver services of the highest quality at a reasonable cost.