What is Passivation, and how does it better your metal surfaces?

Passivation is a chemical process that removes surface contaminants from stainless steel and creates a thin, protective oxide layer on the surface. This oxide layer is  highly effective when it comes to protecting metal surfaces from corrosion.

Stainless steel is resistant to corrosion because of the presence of chromium in its alloy. Chromium reacts with oxygen to form a thin oxide layer on the surface of the steel. This oxide layer is what protects the steel from corrosion.

This oxide layer can be damaged by a number of factors, such as welding, grinding, or exposure to harsh chemicals. When the oxide layer is damaged, the underlying steel is exposed to corrosion. Passivation helps to restore the oxide layer and protect the steel from corrosion.

Non-Toxic Passivation Solution Benefits

Safer for You & Your Team

Eliminate hazardous fumes, spills, and the need for special PPE with non-toxic formulas. Prioritise worker safety and environmental compliance with Citrisurf’s non-toxic, plant based passivation solutions.

Peace of Mind in Your Facility

No more hazardous materials storage or disposal headaches. Opt for a clean and green approach that promotes a healthy work environment.

Peace of Mind in Your Facility

No more hazardous materials storage or disposal headaches. Opt for a clean and green approach that promotes a healthy work environment.

In-House Passivation

In-house passivation with easy-to-use, non-toxic passivation solutions, allows you to perform routine maintenance efficiently and safely without relying on external services.

Long-lasting Corrosion Protection

Citric acid passivation creates a thicker, more robust oxide layer on your stainless steel compared to traditional methods, ensuring superior corrosion resistance.

Sustainable and Plant Based Passivation

Reduce your environmental footprint with plant-based passivation solutions that are non-toxic and non-polluting. This is a safer passivation solution for your company and the environment

How does Stainless Steel rust, and how you can protect your metal surfaces from corrosion?

Stainless steel surfaces can be rendered highly corrosion resistant if they are thoroughly cleaned and passivated before use. Even with 300 series austenitic stainless steel, once a corrosion site is established, it will only worsen due to its continuous and self-catalyzing nature. In corrosive situations, the corrosion site will expand rapidly! To obtain optimal corrosion resistance, surfaces must be well cleaned and passivated before use.

 

Factors that can influence the chromium oxide layer and allow stainless steel to rust:

  • Chlorides: Chlorides, such as salt, can break down the chromium oxide layer and allow rust to form.
  • Acids: Acids can also break down the chromium oxide layer and allow rust to form.
  • High temperatures: High temperatures can also break down the chromium oxide layer and allow rust to form

Tips to Prevent Stainless Steel from Rusting

Clean your Metal Surfaces

Regularly cleaning stainless steel and metal surfaces with soap and water to remove any dirt or debris that could harbor rust-causing agents.

Avoid chlorides

If possible, avoid exposing stainless steel to chlorides, such as salt.

Use a sealant

Use a sealant: You can apply a sealant to stainless steel to help protect it from rust.

Frequently Asked Questions

Traditional methods often rely on harsh chemicals like nitric acid, posing safety risks and leaving harmful residues. Non-toxic passivation, like those using citric acid, eliminates these concerns with plant-based, environmentally friendly solutions.

Citric acid passivation offers numerous advantages:

  • Safer: No hazardous fumes, spills, or special PPE needed.
  • Faster: Creates a thicker oxide layer for long-lasting corrosion protection.
  • Efficient: Mobile onsite or in-house options for minimal downtime.
  • Sustainable: Biodegradable and non-polluting, leaving a smaller environmental footprint.

Absolutely, you can perform non-toxic passivation in-house. Our non-toxic, plant based passivation product, Citrisurf, and other citric acid solutions are available for safe and effective in-house maintenance.

Mobile onsite passivation services bring the process directly to you, tackling large projects or equipment in awkward locations efficiently.

No, non-toxic passivation does not compromise effectiveness. In fact, citric acid passivation creates a thicker, more robust oxide layer compared to traditional methods, offering superior corrosion protection.