Pickling and passivation treatment for stainless steel equipment

Pickling & Passivation

Pickling and passivation restores the corrosion resistance of stainless steel equipment by removing heat tint, oxidation, weld scale and surface contamination. Stainless steel surfaces exposed to fabrication, welding, chemical exposure or environmental contamination can lose their protective passive layer, increasing the risk of corrosion and reduced long-term performance.

Beralon performs controlled pickling and passivation services across Australia for industrial systems, stainless steel equipment and fabricated components used across the oil and gas, food and beverage, pharmaceutical, manufacturing, infrastructure and processing sectors. With more than four decades of industry experience, Beralon delivers tailored surface treatment solutions designed to improve corrosion resistance, restore surface condition and support compliance with industry standards.

Our pickling and passivation programs are developed around the material grade, fabrication method, contamination level and operational environment of each project to ensure safe and effective treatment outcomes.

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Stainless steel equipment prepared for pickling and passivation treatment

Stainless steel surface treatment during pickling and passivation

What Is Pickling & Passivation?

Pickling and passivation are chemical surface treatment processes used to clean and restore stainless steel surfaces after fabrication, welding or contamination exposure.

Pickling removes:

Heat tint
Weld scale
Surface oxidation
Embedded iron contamination
Surface impurities and residues

Passivation restores the chromium-rich passive layer on stainless steel surfaces, helping improve corrosion resistance and long-term material performance.

These processes are critical for maintaining the integrity and service life of stainless steel systems operating in demanding industrial environments.

Pickling & Passivation Services

Beralon provides pickling and passivation services for:

Stainless steel tanks and vessels

Pipelines and pipe spools

Heat exchangers

Pressure systems

Process equipment

Stainless steel fabrication components

Food and pharmaceutical processing systems

Our services can be completed using:

Internal circulation methods

Gel Application

Spray Application

Immersion Tank Dipping

On-Site Treatment Process

Each treatment method is selected based on the equipment size, geometry, contamination profile and site requirements.

Pickling and passivation helps businesses to:

Restore corrosion resistance
Remove weld scale and oxidation
Improve stainless steel surface condition
Reduce the risk of premature corrosion
Improve long-term equipment performance
Support compliance with industry and hygiene standards
Extend equipment service life

Proper stainless steel treatment is particularly important for industries operating in corrosive, hygienic or high-purity environments.

Before and after pickling and passivation of a stainless steel vessel

Stainless Steel Surface Treatment Specialists

Beralon performs pickling and passivation for a wide range of stainless steel grades and industrial applications. Our experienced technicians use controlled chemical treatment processes and approved cleaning methods designed to protect equipment integrity while achieving effective surface restoration.

Our procedures are completed in accordance with recognised industry standards including ASTM A380 and ASTM A967.

Industries supported by Beralon’s industrial and chemical cleaning services

Industries We Support

Beralon delivers industrial and chemical cleaning services for a wide range of sectors including:

Food & Beverage

Pharmaceutical

Oil & Gas

Manufacturing & Processing

Energy & Utilities

Infrastructure

Maritime & Defence

Our team supports both routine maintenance programs and complex shutdown or commissioning projects requiring specialised industrial cleaning expertise.

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Pickling & Passivation Expertise

Beralon’s pickling and passivation services are delivered by experienced technicians using controlled chemical treatment methods suited to the stainless steel grade, equipment geometry and contamination level involved.

Our team can complete treatment through immersion, spraying, gel application or internal circulation, depending on whether the work is being completed in-house or onsite. This allows Beralon to treat everything from small fabricated components through to large tanks, vessels, pipelines and process systems.

Each project is managed with safe chemical handling procedures, environmental controls and a focus on restoring stainless steel corrosion resistance without compromising equipment integrity.

Pickling and passivation treatment on stainless steel equipment

Beralon industrial and chemical cleaning services across Australia

Pickling & Passivation Services Across Australia

Beralon provides pickling and passivation services throughout Australia for stainless steel fabrication, shutdown works, commissioning projects, maintenance programs and industrial restoration activities.

From tanks and vessels through to pipelines, heat exchangers and process systems, Beralon delivers reliable stainless steel treatment solutions designed to improve corrosion resistance, operational reliability and long-term equipment performance.

Frequently Asked Questions

What is the difference between pickling and passivation?

Pickling and passivation perform different functions on stainless steel. Pickling removes heat tint, weld scale, oxidation and affected surface material, while passivation helps establish a clean, chromium-rich passive surface that supports corrosion resistance.

Why are pickling and passivation used on stainless steel?

Pickling and passivation are used to restore stainless steel surface condition after fabrication, welding or contamination. They help remove surface defects and contaminants that can affect corrosion resistance and long-term material performance.

Does stainless steel need pickling or passivation after welding?

Stainless steel may require treatment after welding if heat tint, weld scale or surface contamination is present. Pickling can remove these affected surface layers, while passivation may be used where further treatment of the cleaned surface is required.

Can passivation remove weld heat tint?

Passivation alone is not intended to remove weld heat tint or heavy oxide scale. These surface conditions generally require pickling or another suitable cleaning method before passivation is considered.

Is passivation always required after pickling stainless steel?

Not always. A properly pickled and cleaned stainless steel surface can develop a passive surface without a separate passivation treatment. Whether additional passivation is required depends on the surface condition, application and project requirements.

What surface contamination can stainless steel pickling remove?

Pickling can remove heat tint, weld scale, surface oxidation, embedded iron contamination and other surface impurities or residues. The treatment helps expose a cleaner stainless steel surface after fabrication or contamination.

What equipment can Beralon pickle and passivate?

Beralon provides pickling and passivation for stainless steel tanks and vessels, pipelines and pipe spools, heat exchangers, pressure systems, process equipment, fabricated components, and food and pharmaceutical processing systems.

How can Beralon carry out pickling and passivation?

Beralon can use internal circulation, gel application, spray application, immersion tank dipping and onsite treatment. The method is selected according to factors such as equipment size, geometry, contamination profile and site requirements.

Can pickling and passivation be carried out onsite?

Yes. Beralon can perform onsite pickling and passivation where appropriate, allowing larger tanks, vessels, pipelines and process systems to be treated where removing or transporting the equipment may not be practical.

What standards does Beralon follow for pickling and passivation?

Beralon carries out its pickling and passivation procedures in accordance with recognised industry standards including ASTM A380 and ASTM A967. These standards address the cleaning, descaling and passivation of stainless steel surfaces.

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Beralon provides specialist industrial and chemical cleaning services across Australia, supporting industries including oil and gas, energy, manufacturing, food and beverage, pharmaceutical, infrastructure and utilities.

Pickling & Passivation