Passivation Liquid RX

RXSOL PASSIVATION is Highly Conc and acidic product ,  It does not give Black or Yellow stain marks after washing with water. It simultaneously removes annealing colours, ferritic contamination & weld burns.
Spray is very safe & easy to use for cleaning of large equipments like S.S. vessels, dryers, agitators, dairy machinery, fermentators, internals as well as externals of pipes by pressurised spray bottle or pump. passivation proces improve the corrosion resistance of metal parts / surface.

Concentrated materials are suitable for use only on stainless steel. While diluted  is suitable for cleaning aluminum.

Carbohydrazide also passivates metals and reduces metal oxides converting ferric oxide to ferrous oxide and converting cupric oxide to cuprous oxide.

Carbohydrazide reacts directly with oxygen. It helps prevent oxygen damage and continues to passivate metal surfaces during wet lay-up. Carbohydrazide can also be used as a curing agent for epoxide-type resins.

It is used to clean weld seams and surrounding areas with brush. It is used to remove heavy scales, discolouration, annealing colours, rust particles near weld and welding affected area by heat.

Circulation method : For closed system like PIPE , use concentrated materials atleast for 1-2 Hrs . Then FLUSH the system with TECHNICAL GRADE OF DI-WATER ( which is free from , all SOLUBLE IMPURITIES )

Spray Method : For TANK PASSIVATION , this is very effective method . Directly spray on wall of TANKS atleast for 10-15 Minutes , then wash the system with cupious amout of fresh water , finally use TECH GRADE DI water for complete wash.

 

Procedure of Passivation

1. Isolate the exchanger and set up a circuit with an external tank with heating coil inside and a pump to circulate cleaning solution.

FLUSHING:-

2. Flush the Exchanger with fresh water to remove loose material (like dirt etc.) till such time clear water comes.

INHIBITED ACID CLEANING:-

3. Circulate inhibited Acid (5-6 % Citric Acid and 1% Rodine 213) along with non ionic wetting agent like RXSOL-T300  through Exchanger Loop for 6 to 8 hours
4. It total iron concentration reaches 5000 - 8000 PPM and concentration below 2% acid percentage then dump the cleaning solution and repeat the cycle with fresh inhibited acid.
5. Samples to be tested for pH, TDS and iron on hourly basis.
6. Normal operating temperature should be 50-60º C.
7. When iron concentration and acid concentration of solution reaches steady state and cleaning in completed. Drain the cleaning solution.

NEUTRALIZING:-

8. Circulate 1-2% solution of soda Ash for one to two for neutralization.
9. Rinse the neutralizing solution with water till pH of Inlet and Outlet is same.

PASSIVATION:-

10. Immediately fill and Circulate with 1-3% of solution of sodium Hexametaphosphate for 4-6 hours keeping operating temperature around 50-60º C. Analyze for Phosphate levels in Inlet and Outlet. (Normally maintain 30-40 PPM O-PO4 level)
11. Drain the passive solution without flushing with water.

DRYING:-

12. Dry the circuit with dry air/N2.

Dosage

For Pickling This is probably the most commonly used method. Use a solution of nitric and hydrofluoric acids in water. We use ASTM A380, solution D. The formula is specified in A380 as 6 - 25% HNO3 and ½ - 8% HF in water at 70 -140 F (21 - 60 C) for about 30 minutes. This is a strong cleaning solution and may etch highly finished surfaces.

Coverage / kg : Approx. 100 meters of weld seam.
 

Remarks

DENGEROUS FOR ALL BODY PART
 

NB. Before disposing the passivating fluid it should be neutralized. ( Caustic / Soda ash /  slaked lime )
 

In accordance with the latest E.E.C Council directives
R 34                        :               Causes burn

S2                           :               Keep out of reach of children

S 26                        :               In case of contact with eyes rinse immediately with plenty of wate and seek medical advice

Supply Locations

Passivation Liquid RX manufacturer supplier distributor in Mumbai, Kandla, Kolkata, Vizag, Chennai, India, Fujairah, Dubai UAE, Muscat Oman, Kenya Africa. Get the best quality of Passivation Liquid RX at a competitive price from us. We have ready stock of Passivation Liquid RX in India, UAE Gulf, Oman, Kenya Africa. Contact us for bulk as well as small orders.