NALTIC Industrials, LLC

Oakite Deoxidizer LNC

For Boeing Spec BAC 5765, Non-chromated, liquid acidic material for deoxidizing and desmutting aluminum and aluminum alloys

A Product of Chemetall US In.
For removing oxides, alkaline etching smut and discoloration from aluminum and aluminum alloys. It is used before chromate conversion coating, non-chrome conversion coating, anodizing, electrical resistance welding, and other operations that require a very low level of surface contamination.

Primary Application

Oakite Deoxidizer LNC is a non-chromated, acidic material for removing oxides, alkaline etching smut and discoloration from aluminum and aluminum alloys. It is used before chromate conversion coating, non-chrome conversion coating, anodizing, electrical resistance welding, and other operations that require a very low level of surface contamination.

It performs well in hard water, requires no heat, deoxidizes rapidly and rinses freely. Oakite Deoxidizer LNC meets Boeing Process Specification BAC 5765, Cleaning and Deoxidizing Aluminum Alloys, and can be used to meet the requirements of SAE-AMS-W-6858, Welding, Resistance: Spot and Seam.

CHEMICAL CHARACTERISTICS for Oakite Deoxidizer LNC

FEATURE

CHARACTERISTIC

Chemical composition blend of iron salts, nitric acid and fluoride
Physical form as received: dark reddish-brown liquid
as used: light yellow solution
Odor not specified
Specific gravity 1.433 at 20 °C (68 °F)
Normal working temperature ambient: 50° to 100 °F (10° to 38 °C)
Normal working concentrations 10 to 20% by volume
pH at working concentrations less than 1.0 at 10% concentration
Rate of metal loss from 24 hour immersion in Oakite Deoxidizer LNC, 20% by volume at 120 °F (49 °C), projected for one year, is as follows:

metal alloy
steel (1010)
stainless steel (316)
stainless steel (403)
copper
brass
aluminum (3003)
magnesium
galvanized steel

mm/yr
43.26
0.00
0.00
44.53
52.83
23.27
attacks
attacks
in/yr
1.703
0.000
0.000
1.753
2.080
0.916
attacks
attacks

Approvals:

Meets Boeing Process Specification BAC 5765, Cleaning and Deoxidizing Aluminum Alloys
Meet the requirements of SAE-AMS-W-6858, Welding, Resistance: Spot and Seam.

Application Procedure:

Surfaces should be clean and free of organic contaminants. Immerse in a 10 – 20% by volume solution of Oakite Deoxidizer LNC at ambient temperature. Immersion time is normally 1 – 5 minutes. Process parameters will vary depending on the age of the bath and the degree of smut, oxidation or other contaminant on the surface. The
solution should be air agitated. Rinse thoroughly in clean ambient temperature water. A bath of Deoxidizer LNC has an etch rate on alloy 2024-T3 aluminum that ranges between 0.03 and 0.10 mils/surface/hour, depending upon the age and concentration of the bath.

Solution Control
Deoxidizer LNC should be monitored and replenished on a regular basis, for example daily, by the ferric iron titration. On a less frequent basis, for example weekly or monthly, Deoxidizer LNC should be monitored and replenished by the total acid titration.

Ferric/iron:
1. Place a 5 mL sample of the bath into an Erlenmeyer flask.
2. Add about 50 mL of deionized water.
3. Add 30 – 40 drops of Gardotest Indicator 195 (Sulfosalicylic Acid). The color will turn dark red.
4. Titrate with Gardotest Solution 90 (0.1M Versene) until the color turns yellow.
5. Percent by volume Deoxidizer LNC may be calculated by multiplying the milliliters used by 1.1

Total Acid:
1. Place a 10 mL sample of the bath into an Erlenmeyer flask.
2. Add about 100 mL of deionized water.
3. Add about 10 mL of Gardotest Solution 10 (Potassium Fluoride).
4. Add 5 – 10 drops of Gardotest Indicator 2 (Phenolphthalein).
5. Titrate with Gardotest Solution 37 (1 N Alkali) until the solution turns from colorless to pink.
6. Percent by volume Deoxidizer LNC may be calculated by multiplying the milliliters used by 2.4

For Boeing Procedure B-232 click here.

REPLENISHMENT

Normal replenishment, based on the ferric/iron titration is with additions of Deoxidizer LNC. As the bath is used, the total acid of the Deoxidizer LNC solution tends to decrease. For each percent by volume based on total acid, below the percent by volume based on ferric/iron, add 9.5 gallons of Gardobond Additive H 7140/1 per 1000 gallons of bath.

NOTES ON USE

Tanks, piping and equipment should be constructed of alloy 316 stainless steel or lined with polypropylene, CPVC, PTFE (Teflon) or PVDF (Kynar) or other material as approved by the equipment manufacturer. Elastomer for pump and valve seals etc should be Viton. Keep concentrate away from combustible, organic and readily oxidizable materials. Avoid prolonged contact of concentrate with glass, ceramic or concrete. If contact is made, rinse surface thoroughly with water. Avoid contact or mixing with chlorine-releasing materials.

Process Technologies Tank Heater and Accessories Pricing

Safety and Handling:

Prior to handling and use of Oakite products see the Material Safety Data Sheet/ This should be read and understood by all personnel in contact with the product.

KEEP OUT OF REACH OF CHILDREN

Disposal:

Any disposal of Oakite products should be in accordance with all applicable federal, state, and local regulations.

The process solution can contain components other than those present in the product as supplied. Analysis of the process solution may be required prior to disposal.

Storage:

Indoor storage at temperatures between 40 °F and 100 °F is recommended. All containers should be tightly closed when not in use.

SUGGESTION OF OTHER PRODUCTS YOUR COMPANY MAY USE

• CLEANERS
• ETCHANTS
• DEOXIDIZERS
• RUST PREVENTIVES
• METALWORKING FLUIDS (coolants and lubricants)
• WASTE WATER TREATMENT CHEMICALS
• FLOOR CLEANERS AND MAINTENANCE PRODUCTS
• PROCESS EQUIPMENT/CONTROL SYSTEMS

DISTRIBUTED BY NALTIC INDUSTRIALS AN AUTHORIZED DISTRIBUTOR FOR THE USA

Chemetall US, Inc. (“Chemetall”) warrants that products described within its official technical papers will conform with its published specifications. The products supplied by Chemetall and information related to them are intended for use by buyers having necessary industrial skill and knowledge. Buyers should undertake sufficient verification and testing to determine the suitability of the Chemetall materials for their own purpose. Since buyer’s conditions of use of products are beyond Chemetall’s control, Chemetall does not warrant any recommendations and information for the use of such products.

CHEMETALL DISCLAIMS ALL OTHER WARRANTIES INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE IN CONNECTION WITH THE USE OF ITS PRODUCTS.

Please contact us directly for a complete and official Chemetall Technical Data Sheet and/or MSDS in PDF. 
Contact us: Office (888) 891-0077
email: 411@naltic.com

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USA