Vanconol® IR-902 Acid Pickling Corrosion Inhibitor

Vanconol® IR-902 Acid Pickling Corrosion Inhibitor

Vanconol® IR-902 is a corrosion inhibitor specifically designed for steel pickling processes.This product features a unique multi-component synergistic formulation that forms a dense and stable protective film during steel pickling, effectively inhibiting excessive corrosion of the substrate by the acid solution while reducing acid mist evolution and hydrogen evolution, significantly improving steel surface quality.The product is environmentally friendly, non-toxic, and free of heavy metals, and can be used for steel pickling, industrial equipment cleaning, surface treatment of mechanical parts, and infrastructure maintenance.

Chemical Composition

Polyamine imidazoline derivatives, synergistic additives, water, etc.

Product Advantages

Excellent corrosion inhibition performance: The product forms a dense and stable protective film on the steel surface, significantly reducing over-corrosion of steel by acid solutions, effectively inhibiting hydrogen evolution and preventing hydrogen embrittlement.

Acid mist suppression: Through multi-component synergistic design, the product effectively suppresses acid mist, improving the working environment.

Broad applicability: It demonstrates excellent corrosion inhibition performance across various inorganic acids (hydrochloric acid, sulfuric acid, phosphoric acid) and organic acids (citric acid and its ammonium salts) in a wide range of pickling systems.

High-temperature stability: At extreme temperatures up to90°C (e.g., in citric acid systems), IR-902 maintains a good corrosion inhibition efficiency, which is particularly important for high-temperature operations such as boiler cleaning and heat exchanger descaling.

Environmental safety: Low volatility, compliant with environmental requirements, reducing environmental burden.

Mechanism of Action

The product employs a unique multi-component synergistic design that not only enables the corrosion inhibitor to form a stable adsorption film on the metal surface but also enhances film density and acid resistance, ensuring stable performance in complex pickling environments.

Typical Properties

Item Range Test Method

Appearance (25°C)Reddish-brown liquidVisual

Density0.90–1.10Gravimetric

Water solubilityMiscible with waterVisual

pH value3.0–4.0pH meter

Typical Application Data

Fig.1 Corrosion rate comparison in different acid solutions

Fig.2 Corrosion inhibition efficiency comparison in different acid solutions

Note: The above data were obtained at a corrosion inhibitor dosage of0.3% and reflect results under the specific test conditions at that time; they are not intended as typical specification requirements.

Application Areas

Steel pickling: During cold-rolled and hot-rolled steel production, an iron oxide scale (rust) forms on the surface, which must be removed by pickling with hydrochloric or sulfuric acid. The pickling corrosion inhibitor effectively protects the base iron from excessive dissolution, reducing metal loss and improving steel surface quality.It can also be used in the surface pickling treatment of seamless steel pipes and welded pipes prior to further processing.

Component surface treatment: Before electroplating, coating, welding and other processes, metal parts require pickling for rust removal. The corrosion inhibitor helps ensure dimensional accuracy and surface integrity of the parts.

Castings cleaning: Used for removing residual molding sand and oxide scale from casting surfaces.

Industrial rust removal and maintenance: Used when pickling rusted rebar during building maintenance or precast component production to protect rebar strength.Additionally, large steel structures often require chemical rust removal before coating, where the corrosion inhibitor helps control corrosion depth.

Handling Recommendations

Wear appropriate personal protective equipment before use;

For preparation, add directly to the pickling tank and stir until uniformly dissolved;

Add at0.3–1% by volume of the acid solution; the optimum dosage should be determined through dose-response screening;

Neutralize waste liquid to apH of approximately6–9 before discharge.

Storage and Transportation