Filming Amine Corrosion Inhibitor — ART NOCOR 532
A filming amine corrosion inhibitor is an oil-soluble organic formulation that lays a water-repellent molecular barrier over metal surfaces in refinery overhead systems. ART NOCOR 532 is CHIMI ART's filming amine blend for petrochemical service, protecting topping units, vacuum towers, de-propanizers, de-butanizers and steam cracking units against acidic overhead corrosion. An amber liquid supplied in 200 L drums and 1000 L IBCs, it is injected continuously into the overhead stream.
Product Overview
A filming amine corrosion inhibitor is an oil-soluble organic formulation that lays a water-repellent molecular barrier over metal surfaces in refinery overhead systems. ART NOCOR 532 is CHIMI ART's filming amine blend for petrochemical service, protecting topping units, vacuum towers, de-propanizers, de-butanizers and steam cracking units against acidic overhead corrosion. An amber liquid supplied in 200 L drums and 1000 L IBCs, it is injected continuously into the overhead stream.
Technical Specifications
- Appearance
- Amber liquid
- Concentration
- Filming amine blend
- pH Range
- 7.0-9.0
- Solubility
- Oil soluble
- Available Packaging
- 200L drums · 1000L IBC
- Shelf Life
- 18 months
- Storage Conditions
- Cool, dry place
| Property | Value |
|---|---|
| Appearance | Amber liquid |
| Concentration | Filming amine blend |
| pH Range | 7.0-9.0 |
| Solubility | Oil soluble |
| Available Packaging | 200L drums · 1000L IBC |
| Shelf Life | 18 months |
| Storage Conditions | Cool, dry place |
Applications
Dosing Guidelines
ART NOCOR 532 is injected continuously into the overhead system, upstream of the point where water first condenses, using a metering pump; injection quills or atomizing nozzles help distribute the inhibitor across the vapour stream. There is no universal dose rate: the requirement depends on crude throughput, chloride and sulphur loading, desalter performance and wash-water practice, so the rate is established during a supervised field trial and then trimmed against results. Monitor overhead boot-water pH and iron counts, and track corrosion coupons or ER probes; adjust injection to hold the plant's target corrosion rate. Our technical team supports trial design and ongoing optimisation.
How It Works
Corrosion in distillation overheads occurs where water first condenses: chlorides hydrolysed in the crude form HCl, which concentrates in the initial condensate along with H₂S and attacks carbon steel in exchangers, condensers and drum internals. ART NOCOR 532 counters this by film formation. The polar amine head groups of the molecule chemisorb onto the metal, while the oil-soluble hydrocarbon tails orient outward, building a continuous hydrophobic layer that keeps the corrosive aqueous phase separated from the steel. The film is self-repairing under continuous injection: as portions are removed by turbulence or heat, fresh inhibitor adsorbs onto the exposed sites. Filming amine treatment complements — but does not replace — neutralization control of overhead pH; the two are typically operated together as part of an overhead corrosion control program monitored with coupons or probes.
Usage Tips
Store ART NOCOR 532 in closed original drums or IBCs in a cool, dry, well-ventilated area away from heat, ignition sources and strong oxidisers; shelf life under these conditions is 18 months. Keep containers bunded and label dosing lines clearly. Amines can irritate skin and eyes, so wear chemical-resistant gloves and goggles and avoid breathing mists at the injection point. Flush metering pumps and quills with a compatible hydrocarbon when taken out of service to prevent fouling. Consult the SDS before handling.
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Frequently Asked Questions
Where should ART NOCOR 532 be injected in an overhead system?
Upstream of the initial condensation point, so the film is established where wet HCl corrosion is most aggressive — typically into the overhead vapour line via a quill or atomizing nozzle. Placement is confirmed during the field trial with your process engineers.
Does a filming amine replace overhead neutralizers?
No. Neutralizing amines control the pH of the condensing water, while the filming amine builds a physical barrier on the steel. The two act on different parts of the corrosion mechanism and are normally run together within one overhead corrosion control program.
How do I verify that the inhibitor is working?
Track iron and pH in the overhead boot water, and measure metal loss directly with corrosion coupons or ER probes. A successful program shows falling iron counts and a corrosion rate held at the plant's target; the injection rate is then trimmed to the minimum that sustains it.
Which units can be treated with ART NOCOR 532?
Atmospheric topping units, vacuum towers, de-propanizers, de-butanizers and steam cracking units — broadly, condensing overhead systems in refineries and petrochemical plants where acidic condensate attacks carbon steel.
How should ART NOCOR 532 be stored on site?
In closed original 200 L drums or 1000 L IBCs, in a cool, dry, ventilated area away from oxidisers and ignition sources. Shelf life is 18 months under these conditions. Keep containers bunded and consult the SDS for handling and PPE.
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