Unitor Corrosion Protection and Inhibitors

Corrosion in cooling systems, brine circuits, and condensate lines is a constant threat to offshore assets, causing leaks, reduced heat transfer, and premature equipment failure. We stock a range of Unitor corrosion inhibitors engineered for marine duty, helping shipowners and offshore operators control rust, pitting, and scaling in chloride-rich and multi‑metal systems.

By standardising on Unitor treatments across your cooling water, brine, and steam circuits, you can maintain stable water chemistry, extend component life, and cut unplanned maintenance in demanding saltwater environments. Our Unitor range is fully compatible with broader onboard chemical programmes, including water treatment, fuel additives, and cleaning products.

Corrosion Protection and Inhibitor Range

The Unitor corrosion control range covers closed cooling water, aluminium and mixed‑metal engines, condensate lines, and chloride brine systems. Each product is supplied in marine‑ready pack sizes, with technical data and dosing guidance available from our support team.

Brine Systems and Chloride Environments

For refrigeration plants and secondary cooling circuits using chloride brines, Unitor Brine Corrosion Inhibitor 777044 26 provides targeted protection against pitting and galvanic attack. This inhibitor helps control corrosion on carbon steel, cast iron, and other common construction metals exposed to high‑chloride loadings, supporting reliable cold‑room and cargo‑cooling performance.

Aluminium and Mixed‑metal Cooling Systems

Where engines and auxiliary equipment incorporate aluminium components, Unitor Cooltreat AL 680843 26 is formulated to safeguard the entire cooling circuit. This nitrite‑based treatment provides corrosion protection for aluminium and mixed‑metal systems while helping to limit scale deposits that reduce heat transfer efficiency.

For operators standardising on extended‑life coolant technology, Unitor Cooltreat ELC 779030 26 delivers long‑term corrosion inhibition with built-in anti‑freeze capability. This organic‑acid technology coolant is designed for modern high‑output engines and auxiliary cooling systems where reduced maintenance and stable protection over longer service intervals are priorities.

Closed Cooling Water Circuits

In conventional closed fresh‑water cooling loops, Unitor Rocor NB Liquid 571356 26 provides reliable protection for ferrous and non‑ferrous metals. The nitrite–borate formulation helps prevent internal corrosion on engine blocks, heat exchangers, and pipework, supporting stable operating temperatures and reducing the risk of sludge formation.

Steam and Condensate Systems

For steam plants and heating systems, Unitor Condensate Control 774828 26 is used to neutralise carbonic acid and minimise corrosion in condensate return lines. By maintaining controlled pH in the condensate system, this treatment supports boiler integrity, reduces metal loss, and helps preserve overall plant efficiency.

Typical Applications

Unitor corrosion inhibitors are selected by marine engineers and rig maintenance teams for critical systems where metals are continuously exposed to aerated saltwater or chemically aggressive environments. Typical applications include:

• • Main engine and auxiliary generator cooling systems protected with Cooltreat AL or Cooltreat ELC in aluminium and multi‑metal circuits.
• • Closed‑loop cooling water for thrusters, winches, and deck machinery treated with Rocor NB Liquid to limit internal corrosion.
• • Steam tracing and heating systems, where Condensate Control protects carbon steel condensate lines from acid attack.
• • Brine‑based refrigeration circuits and secondary cooling loops safeguarded with Brine Corrosion Inhibitor in high‑chloride environments.

By matching inhibitor chemistry to system type and metallurgy, you can extend equipment life, maintain heat transfer performance, and align with OEM recommendations for cooling and condensate water quality.

Why choose Offshore Supply?

Offshore Supply supports shipyards, vessel operators, and offshore installations with rapid access to genuine Unitor corrosion inhibitors and related marine chemicals. Our role as a specialist chandlery means you can consolidate multiple chemical categories and deck supplies through a single, experienced provider.

For urgent requirements or help specifying a corrosion protection programme for your vessels or offshore plant contact us today, or call 01524 862 010, and our team will assist with product selection and availability.

FAQs

Which Unitor inhibitor should I use for aluminium cooling systems?
Aluminium‑based and mixed‑metal engine cooling circuits are typically treated with Unitor Cooltreat AL or Cooltreat ELC 779030 26, depending on whether you require conventional or extended‑life coolant technology.

What is the difference between Rocor NB Liquid and Brine Corrosion Inhibitor?
Rocor NB Liquid is a nitrite–borate inhibitor designed for closed fresh‑water cooling systems, whereas Brine Corrosion Inhibitor targets chloride‑rich brine circuits used in refrigeration and secondary cooling.

Can I treat my condensate return lines with Unitor chemicals?
Yes, Unitor Condensate Control 774828 26 is formulated to neutralise condensate acidity and reduce corrosion in steam and condensate systems.

Do these corrosion inhibitors come with technical documentation?
All Unitor inhibitors supplied by Offshore Supply are supported by technical datasheets and safety documentation, with additional guidance available from our team when you are setting up or adjusting treatment programmes.