ANTIOX SP

Description:

ANTIOX SP is a surface treatment designed to be integrated into the ANTIOX PC-X preclean line by addition to the sulfuric acid bath used for desmutting after etch.

ANTIOX SP Surface Prep is an integral part of the ANTIOX PC-X Organic Protective Coating system (OPC). It functions to stop post-etch smut formation and oxidation, aids rinsing thereby minimizing acidic drag-in to the ANTIOX PC-X treatment bath, and forms the foundation for the ANTIOX PC-X protective coating.

Properties:

Form:                                                Clear green liquid
pH (as supplied):                            2 to 3
Specific gravity:                              1.032
Weight/Gallon                                 8.61 lbs
Solubility, water:                             Insoluble
Solubility, 5% + H₂SO₄                 Infinite
Flash point:                                      >250°F
Odor:                                                Mild, characteristic

Applications:

ANTIOX SP Surface Prep is intended for use only in the preclean line used for the application of ANTIOX PC-X

Directions For Use:

ANTIOX SP is not soluble in neutral water. It is only compatible with sulfuric acid system and should be added to the bath last, AFTER the acid has been added.

MAKE-UP: Add sulfuric acid to water to make a 5-7 1/2% by volume solution (ALWAYS add acid to water. NEVER add water to concentrated acid.) Allow to cool.

CONCENTRATION: Add 5% ANTIOX SP by volume to the acid bath. Mix well.

TIME: 30 seconds to 1 minute.

TEMPERATURE: 80°F ± 5°F

AGITATION: None required

FILTRATION: Recommended

OPERATION: Immersion or Spray

Equipment:

TANKS: polypropylene, PVC, PVDC, polyethylene, polypropylene

RACKS: 316 s/s - plastisol coated preferred.

HEATERS: Not generally needed. If required use titanium, quartz, or Teflon coated. Stainless steel heaters are not recommended for use with 10% or stronger sulfuric acid solutions

PUMPS: PVC, PVDC, polypropylene

FILTER HOUSING: PVC or polypropylene

FILTER ELEMENT: 10 to 20 micron polypropylene

PLUMBING: PVC, polypropylene, PVC, PVDC

Maintenance:

ACID CONTENT: Maintain sulfuric acid between 5 and 7 1/2% (see section on CONTROL)

BATH STRENGTH: Maintain ANTIOX SP between 50% and 100% with additions of concentrate according to the schedule given in the section on bath analysis and control

Control:

Titration procedure for Sulfuric Acid:

1. REAGENTS
   1. Sodium Hydroxide, 1.0 Normal (1.0 N NaOH)
   2. Phenolphthaleim indicator solution.
2. APPARATUS
   1. Beaker, 250 ml
   2. One 5 ml pipet
   3. One 50 ml buret
3. PROCEDURE
   1. Pipet 5 ml of working bath into 250 ml beaker..
   2. Add 150 ml of distilled or D.I. water.
   3. Add 3 drops of indicator solution
   4. Titrate with 1.0 normal NaOH to a pale pink end-point.
4. CALCULATIONS
   1. ml of titrate X 9.8 / 1.8354 = ml/liter
   2. Divide milliliters by 1000 to get % by volume

    

Titration procedure for ANTIOX SP:

1. REAGENTS:
   1. Silver nitrate, 0.1 normal
   2. Amm Hydroxide AR Grd (30%)
   3. Nitric Acid, AR Grd (70%)
   4. Ferric ammonium sulfate, AR Grd. (crystals)
   5. Ammonium thiocyanate, 0.1 normal
   6. Distilled water (chloride free)
2. APPARATUS:
   1. 500 ml beaker
   2. One 5 ml pipet and one 1 ml pipet
   3. Two 10 ml pipets and one 20 ml pipet
   4. One 50 ml buret
   5. A 50 ml & 100 ml measuring cylinder
   6. A 500 ml Buchner funnel & vacuum flask
   7. No 5 Whatman filter paper (5.5 cm for 6 cm funnel)
   8. Whatman cellulose powder, type CF-1
   9. Vacuum pump (Nalgene #6130-0200)
3. INDICATOR SOLUTION
   1. To 80 grams of AR Grade Ferric Ammonium Sulfate, add 10 ml of concentrate (70%) Nitric Acid
   2. Add distilled water to 200 ml
   3. Stir with mild heat
   4. Bottle and label
4. PROCEDURE:
   1. Pipe 10 ml sample from working bath into 500 ml beaker and add 125 ml distilled water
   2. Add 5 ml conc Ammonium Hydroxide and 20 ml of 0.1 Normal Silver Nitrate. Stir well and let stand for 5 minutes to allow coagulation of precipitate.
   3. Add 3 gms of cellulose powder to aid filtration. Mix well and vacuum filter through the Buchner funnel using #5 Whatman paper. Be sure to transfer all the solution and precipitate.
   4. Wash beaker with 3 X 50 ml portions of distilled water. Pour each increment through the filter allowing the vacuum to dry the filter cake between each flushing return clear, filtered solution to the 500 ml beaker.
   5. Slowly stir 10 ml conc. Nitric acid into clear filtrate.
   6. Add one (1) ml of indicator (#3)
   7. Titrate to a pale orange end point with 0.1 normal Ammonium Thiocyanate.
5. CALCULATIONS
   1. Percent bath strength = [(A X N1) - (B X N2)] X 1.332
   2. The above is calculated where:
      • A= ml of silver nitrate added.
      • N1= normality of silver nitrate
      • B=ml ammonium thiocyanate used
      • N2=normality of ammonium thiocyanate.
   3. Calculation X 100 = percent (%)
6. REPLENISHMENT:
   1. Determine bath strength in percent
   2. Using the % bath strength guide below, for every ten (10) gallons of working bath add ANTIOX PC-X concentrate according to the schedule shown:
      • 100%                              0
      • 90 %                               0.05 gallons/189 ml
      • 80 %                               0.10 gallons/378 ml
      • 70 %                               0.20 gallons/757 ml
      • 60 %                               0.25 gallons/946 ml
      • 50 %                               0.25 gallons/946 ml
      • 40 %                               0.30 gallons/1135 ml
   3.  Example: a 60 gallon bath at 80% would require 2268 ml of ANITOX SP to bring it back to 100%. 60 gals / 10 = 6 X 378 ml = 2268 ml or 0.6 gallons)

Analysis By Board Count:

Keeping track of the square feet of board surface processed through the bath can greatly reduce the titration frequency. Calculate as follows: Theoretical ANTIOX SP bath yield is 500 sq. ft. per gallon of 5% working bath including allowance for drag-out. Thus 250 sq ft per gallon will reduce a fresh bath to 50%. A 100 gallon bath will therefore process 25,000 sq ft of board material (250 X 100 gals.) before requiring replenishment. Do not operate the ANTIOX SP bath below the minimum strength of 50% or below 75°F.

Safety:

Do not use ANTIOX SP with NITRIC ACID, FLUBORIC ACID, CHROMIC ACID, MURATIC ACID, HYDROFLUORIC ACID, or with any OXIDIZERS or ETCHANTS.

ANTIOX SP should be used in accordance with good safety practices. Wear a face shield, apron, gloves, and any other appropriate safety equipment when mixing or handling this product. In case of skin contact flush with copious quantities of fresh, cool water. In case of eye contact, flush immediately with cool fresh water for at least 15 minutes and consult a physician. In case of accidental ingestion consult a physician immediately.

Disposal:

ANTIOX SP should have no effect on disposal procedures normally used for sulfuric acid baths.

Storage:

Keep containers sealed. Keep partial containers closed at all times. Store product away from sources of direct heat. Keep away from oxidizing agents.

Shelf Life:

Anitox is guaranteed for (1) year from date of receipt in unopened containers.

Containers:

Five gallon pails and 55 gallon nonreturnable plastic drums.

Classification:

National Motor Freight Classification NO. 44425
DOT Hazardous Material Description: Water-based Glycol solution

The information contained herein is based on our experience and is believed to be reliable. However, since methods and conditions of use of our products as described are beyond our control, both the product and instructions for its use are offered without warranty, expressed or implied. No information on this data should be construed as a recommendation by DURATECH INDUSTRIES, INC., to use any product in contravention of any patent right.