RXSOL CHEMO PHARMA International Navi Mumbai, India

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Passivation

Water Treatment

Welded stainless steel is not corrosion-resistant until the heat tint is pickled off and the chromium-oxide layer is restored. RXSOL supplies the full sequence used by fabricators, shipyards and food-plant maintenance crews: RX JELLY Pickling Paste (HF/HNO3 gel for weld seams) and the matching Pickling Paste Neutralizer; Passivex C and Passivation Liquid RX (nitric-acid based) and Safe Passivator Liquid 630 (citric-acid based, no nitric fumes) for immersion or spray passivation; Passivate-1 SS Cleaner and Passivate-2 SS Surface Cleaner for pre-cleaning; Super Dilac Acidic Detergent for scale and residue; Spatter Remover Welding Anti Spatter; and the test chemicals — Copper Sulphate passivation test, Ferroxyl test, Palladium Chloride Solution and Passivation reagent 17 — to prove the result. Hydrofluoric Acid 50% and a triazine-based H2S scavenger/corrosion inhibitor are listed for formulators and oilfield users.

Pages give contact time, temperature, the rinse sequence and the ASTM-style test to verify passivation.

Frequently asked questions

Nitric or citric passivation?

Nitric (Passivex C) is the traditional, fastest method; citric (Safe Passivator 630) is safer to handle, fume-free and accepted by most standards for 300-series stainless.

How do I check passivation?

Copper-sulphate test (no copper plating in 6 minutes) or ferroxyl test (no blue spots) — both kits are in stock.

What is the dwell time for pickling paste?

Typically 30–90 minutes at 20–25 °C depending on heat tint; neutralise and rinse with plenty of water.

Can passivation be done on site?

Yes — spray or brush application with Passivation Liquid RX, then rinse; our bulletin describes the procedure and PPE.

17 products in Passivation

Passivation products