DEOXIDIZER LNC / GARDACID P 4299

$473.57$7,085.78

(5 gal – 50737495)
(54 gal – 50737494)
(263 gal – 50737493)

Non-Chromated, Liquid Acidic Material for Deoxidizing and Desmutting Aluminum and Aluminum
Alloys

SKU: N/A Category:

Additional information

Weight 80 lbs
Dimensions N/A
Weight

263 GAL, 4 GAL, 54 GAL

Primary Application

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. 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 Characterstics

Chemical Composition ………………………………..Blend of iron salts, nitric acid and fluoride
Appearance……………………………………………….Dark reddish-brown liquid
Specific Gravity ………………………………………….1.48 at 20 °C (68 °F)
Normal Working Concentrations…………………..10 – 20% by volume
Normal Working Temperatures…………………….Ambient: 50° – 100 °F (10° – 38 °C)
pH…………………………………………………………….Less than 1.0 at 10% by volume
APPLICATION PROCEDURE
Surfaces should be clean and free of organic contaminants. Immerse in a 10 – 20% by volume solution of
Deoxidizer LNC at ambient temperature. Immersion time is normally 1 – 5 min. 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.
SOLUTIONS CONTROL
Deoxidizer LNC should be monitored and replenished on a regular basis, for example daily, by the ferric iron
titration, Gardotest Procedure 25. On a less frequent basis, for example weekly or monthly, Deoxidizer LNC
should be monitored and replenished by the total acid titration, Gardotest Procedure 150.

Ferric Iron (Gardotest Procedure 25):
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 Disodium EDTA) until the color turns yellow.
5. Percent by volume Deoxidizer LNC may be calculated by multiplying the milliliters used by 1.1.
Total Acid Gardotest Procedure 150:
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.
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 gal of Gardobond
Additive H 7140/1 per 1000 gallons of bath.

EQUIPMENT

Automatic Control: The Chemetall Electrodeless Conductivity/Concentration Control System and Chemical
Metering Pump can be used to monitor and automatically maintain the concentration of this product using
conductivity. Please contact the Chemetall Process Equipment and Engineering Department for specific
recommendations.
NOTES ON USE (See Safety Data Sheet)
Tanks, piping and equipment should be constructed of alloy 316 L 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.

SAFETY & HANDLING

Prior to handling and use of any of the materials referenced in this document, the Safety Data Sheets should
be read and understood by all personnel in contact with these materials.
KEEP OUT OF REACH OF CHILDREN

STORAGE
Dry indoor storage at temperatures between 40 °F and 100 °F (4.4 °C and 37.8 °C) is recommended, away
from any incompatible materials referenced in the Safety Data Sheets. All containers should be tightly
closed when not in use.
DISPOSAL
Any disposal of the materials referenced in this document should be in accordance with all applicable
federal, state, providential and local regulations. The process solution can contain components other than
those present in the materials as supplied. Analysis of process solutions

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