Vanconol® SA-90 Corrosion Inhibitor for Aluminum Alloy Acid Pickling
Product Overview
Vanconol® SA-90 is a high-efficiency, environmentally friendly corrosion inhibitor designed for aluminum alloy materials in acidic environments. Its core active ingredient is based on advanced Schiff base technology, providing excellent corrosion protection for aluminum alloys in 5% acid media with corrosion inhibition efficiency consistently above 90%. The product is phosphorus-free and APEO-free (alkylphenol ethoxylates), making it environmentally friendly and a suitable option to replace conventional toxic corrosion inhibitors.
Product Features
- High-efficiency protection: In common pickling solutions such as 5% sulfuric acid, hydrochloric acid and nitric acid, it effectively inhibits over-etching, pitting corrosion and hydrogen embrittlement of various aluminum alloys (1xxx, 3xxx, 5xxx and 6xxx series).
- Environmentally friendly and safe: phosphorus-free and APEO-free, in line with the trend toward green chemicals.
- Strong adsorption and film-forming: Schiff base molecules contain N and O heteroatoms and C=N unsaturated bonds, which form a dense, stable protective film on the aluminum alloy surface through chemisorption.
- Good thermal stability: maintains excellent corrosion inhibition performance over the range of 20°C–60°C.
- Easy to use: liquid formulation, easy to dilute and add.
Technical Data
| Item | Value |
|---|---|
| Appearance | Amber to light yellow clear liquid |
| pH (as supplied) | 6.0 – 8.0 |
| Density (20°C, g/cm³) | 1.05 ± 0.05 |
| Active matter content | ≥30% |
| Solubility | Readily soluble in water and acidic media |
Applications
- Aluminum alloy profile manufacturing: acid pickling of architectural aluminum profiles and door and window frames prior to powder coating or electrophoretic coating.
- Automotive parts: surface cleaning of components such as aluminum alloy wheels and heat exchangers.
- Electronics and electrical appliances: acid pickling of electronic housings and thermal modules.
- Aerospace: maintenance and cleaning of aluminum alloy components for aircraft.
Dosage and How to Use
- Dosage: adjusted according to acid concentration, temperature and process time; a typical recommended dosage is 0.1%–0.3% (1–3 kg per 1,000 liters of pickling solution).
- Addition method: when preparing the bath, add this product first and circulate until uniform, then add the acid; continuous dripping is also possible.
- Process monitoring: regularly test the inhibitor concentration in the bath and replenish in time.
Packaging, Storage and Safety
- Packaging: 25 kg plastic drums, or customized to customer requirements.
- Storage: keep sealed in a cool, ventilated, dry warehouse, away from direct sunlight and high temperatures.
- Shelf life: 12 months.
- Safety: wear safety goggles, rubber gloves and an impermeable apron; in case of eye contact, rinse immediately with clean water for at least 15 minutes and seek medical attention.