We passivate stainless steel using safe, citric acid based CitriSurf technology. Our work follows ASTM A-967, ASTM A380, and AMS 2700, and we can do it at your site anywhere in India.
Passivation is a chemical treatment that removes free iron from the surface of stainless steel and helps build a stable, chromium-rich protective layer. This layer is what keeps stainless steel from rusting and staining. Over time, machining, welding, and handling leave free iron on the surface, which can rust. Passivation cleans that iron away and restores the protective layer.
When free iron is left on stainless steel, it can rust, contaminate your product, and cause you to fail an audit. This is a serious risk in pharma, food, and semiconductor plants where surfaces must stay clean. Passivation lowers that risk by removing the iron and strengthening the protective layer, so your equipment lasts longer and stays compliant.
We passivate with citric acid based CitriSurf products, which remove free iron safely and are friendly to the environment. The older nitric acid method carries real risks for your team, your costs, and the environment.
We match the product to your steel grade and the job. Here is what each one is used for.
Product samples are available for industrial customers, and we can set up a full CitriSurf system at your plant, whatever the size of your operation.
Our passivation work is aligned to ASTM A967, ASTM A380, and AMS 2700, depending on your application. Results can be checked with recognised tests, such as the copper sulfate test, to confirm the surface is free of iron.
We provide on-site passivation for pipelines, vessels, process loops, and stainless steel fabrication systems across India. For large or fixed items, we use spray and gel products so the work can be done in place.
Rouging Solutions provides citric acid passivation services for stainless steel across India using CitriSurf technology. Passivation removes free iron and builds a chromium-rich protective layer that stops rust and contamination. The company uses citric acid instead of hazardous nitric acid, follows ASTM A967, ASTM A380, and AMS 2700, and offers on-site passivation for pipelines, vessels, and fabrication systems.
We are here to help! Request advice on your specific application or a quote on our products by filling in the form below.
Passivation is a chemical treatment that removes free iron and helps create a stable, chromium-rich oxide layer on stainless steel. This layer protects the steel from rust and staining.
We use citric acid based CitriSurf technology. It is safer for your team and the environment than nitric acid, and it still meets ASTM A-967 requirements.
Our work is aligned to widely used industry standards, including ASTM A967, ASTM A380, and AMS 2700, depending on your application.
Yes. We provide on-site passivation for pipelines, vessels, loops, and stainless steel fabrication systems across India.
It depends on the size and type of equipment. Tell us about your system and we will give you a clear timeline before we start.
