Passivation Method verson II
- Part number
- RXSOL-20-1106-100
- Category
- Tank Cleaner
- Brand
- RXSOL
Overview
To effectively passivate the free-machining stainless steels, Carpenter has developed the A-A-A (alkaline-acid-alkaline) process that neutralizes trapped acid. This method of passivation can be accomplished in less than 2 hours. Here is the step-by-step procedure:
1st Step : After degreasing, soak the parts for 30 minutes in a 5 percent solution of sodium hydroxide at 160ºF to 180ºF (71º C to 82º C).
2nd Step : Then rinse the part thoroughly in water.
3rd Step : Next, immerse the part for 30 minutes in a 20 percent-by-volume nitric acid solution containing 3 ounces per gallon (22 g/liter) of sodium dichromate at 120ºF to 140ºF (49º C to 60º C).
After removing the part from this bath, flush it with water, then immerse it in the sodium hydroxide solution for another 30 minutes. Rinse the part again with water and dry it, completing the A-A-A method.
Applications
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.
Safety and SDS
Read the safety data sheet before handling. Wear suitable gloves and eye protection.
View safety data sheet
| Product Name | RXSOL-20-1106-B |
| Product Type | Passivation Method verson II |
Company Details:
RX MARINE INTERNATIONAL
105, A wing , BSEL , TECH PARK.
VASHI ,NEW BOMBAY 400703 INDIA
| Phone | +91 22 65113333 / 5555 / 9999 / 27611360 |
| Fax | +91 22 2781 1318 :::AOH :0091 9821214367 |
| rxsolchemicals@gmail.com |
NITRIC ACID , HYDRO FLUROIC ACID.
|
Environmental Hazards |
Harmful to aquatic organism |
|
Human Health Hazards |
Moderates , May cause sensitization by the skin contact |
|
Physical & Chemical Hazards |
None none |
|
Ingestion |
Harmful, if ingested. |
|
Inhalation |
Irritating to respiratory system |
|
Skin Contact |
Can cause severe irrtation |
|
Eye Contact |
Can cause severe irrtation |
|
|
May cause permanent damage . |
- Non combustible
- Decomposition products may include toxic and irritant fumes
- Not flammable. In case of fire use extinguishing media appropriate to surrounding conditions
|
Personal Precautions |
Wear protective clothing as per section 8 |
|
Environmental Precautions |
Do not allow to enter public sewers and watercourses |
|
Immediate Actions |
Contain spillage by any means possible |
|
Clean Up Actions |
Absorb spillage in inert material and shovel up.Ventilate the area and wash spill site after material pick-up is complete |
|
Special Precautions |
Wear protective clothing as per section 8 |
|
Handling |
The usual precautions for handling chemicals should be observed.See Section 8.Eyewash bottles should be available |
|
Storage |
Keep only in the original container in a cool, well ventilated place (S3/9/49).Protect from frost |
|
Exposure Limits |
There are no recommended or established controls for this product. |
|
Exposure controls |
No special ventilation is required unless the product is used in a spray form. |
|
Occupational exposure controls |
Wear suitable protective clothing, including eye/face protection and gloves (plastic or rubber are recommended).During fumigation/spraying wear suitable respiratory equipment (S42). |
|
Odour |
Odourless |
|
Appearance |
Clear Liquid, pale yellow, soluble in water |
|
pH |
10.5 - 11.5 at 0.1 % concentration |
|
Boiling point > |
100 °C at 760 mm /Hg |
|
Vapour pressure |
not known |
|
Freezing point |
<0 °C at 760 mm/Hg |
|
Completely soluble in water |
|
|
Specific gravity (water=1) |
1.07 |
|
Non combustible |
|
- Stable
- Avoid overheating, Keep away from frost
- See Section 5
|
Toxicological information |
No experimental data available |
|
Inhalation |
Vapours or aerosols may cause irritation of eyes, nose and respiratory tract. |
|
Contact with skin |
Prolonged skin or eye contact may cause chemical burns |
|
Contact with eyes |
Prolonged skin or eye contact may cause chemical burns |
|
Ingestion |
The ingestion of significant quantities may cause burning sensation |
|
Carcinogenicity |
No evidence of carcinogenic effects |
|
Ecotoxicity |
This product has been evaluated on its behaviour in the environment by "The TNO Institue of Environmental Sciences" (The Netherlands organisation for applied Scientific Research). |
|
Their conclusion on this product reads: |
"In general, this cleaning agent poses little danger to the environment, its main ingredients will either dissolve rapidly and dissociate in water or are readily/inherently biodegradable."Based upon their report, IMO's BCH Working Group on the Evaluation of Safety and Pollution Hazards approved this product for use as tank cleaning agent by chemical tankers. |
|
Mobility |
Completely soluble in water |
|
Persistence and Biodegradability |
The components in this product are readily biodegradable. |
|
Bioaccumulation Potential |
Bioaccumulation of the components in this product is insignificant. |
|
Other Adverse Effects |
No environmental problems are expected when the product is used / handled correctly. |
|
Classification |
This material and/or its container must be disposed of as hazardous waste.EU Waste class: 06 02 |
|
Disposal considerations |
Do not discharge into drains or the environment, dispose to an authorised waste collection point. Disposal should be in accordance with local, state or national legislation |
- Not classified as hazardous for transport
|
Risk Phrases |
Causes burns (R34).Irritating to respiratory system (R37). |
|
Safety Phrases |
Avoid contact with skin and eyes (S24/25).Wear suitable protective clothing, eye/face protection (S36/39).In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible) . |
Text of R and S phrase codes used in this safety data sheet:- R34: Causes burns; R37: Irritating to respiratory system.The information provided about the product on this Safety Data Sheet has been compiled from knowledge of the individual constituents The data given here is based on current knowledge and experience. This Safety Data Sheet describes the product in terms of safety requirements and does not signify any warranty with regard to the product's properties The data given here only applies when product used for proper application(s). The product is not sold as suitable for other applications - usage in such may cause risks not mentioned in this sheet. Do not use for other application(s) without seeking advice from manufacturer
DISCLAIMER OF LIABILITY :The information in this SDS was obtained from sources which we believe are reliable. However, the information is provided without any warranty, express or implied, regarding its correctness. The conditions or methods of handling, storage, use or disposal of the product are beyond our control and may be beyond our knowledge. For this and other reasons, we do not assume responsibility and expressly disclaim liability for loss, damage or expense arising out of or in any way connected with the handling, storage, use or disposal of the product. This MSDS was prepared and is to be used only for this product. If the product is used as a component in another product, this MSDS information may not be applicable.
Availability
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