MATERIAL SAFETY DATA SHEET

EPS 1375 ELECTROPOLISHING SOLUTION  Page 1 of 3

METALS THAT PRODUCE EXCELLENT RESULTS:

Aluminum 3003; 5457; 5557; 6061; 6463; 7000 series (Wrought Aluminum Alloys; No

Die Cast Alloys)

Copper, Brass, Monel & Bronze

200 & 300 Series Stainless Steel

GENERAL OPERATING CONDITIONS:

Temperature 140-170 deg. F.

Preferred Temperature 170 F (after enough Aluminum is dissolved)

Anode CD 10-20 amps/sq.ft. GOAD COMPANY

Preferred 15 amps/sq.ft 144 Kentucky Avenue

Independence , MO 64053

Tank Current 3 amps/gallon 800-729-4623

Tank Voltage 18-40 volts (FAX 816-836-2113)

Cathode CD 10-50 amps/sq.ft.

Preferred 15 amps/sq.ft.

Specific Gravity @ 70 deg F 1.483 (New Solution) +/- 0.005

Metal Removal Rate 0.001 inches/1500 amp-minutes/sq.ft

Maximum Dissolved Metal

For Good Polishing 2.5% by weight

Sludging Low Sludging if Stainless Steel Tank

& Cathodes are used.

EQUIPMENT:

Cleaning Tank (ALK.) or Degreaser Drag-out Tank (Acid_

Mild Steel Tank, heated or Polypropylene 316 Stainless Steel or Polypropylene

CF Rinse Tank (ALK.) Mild Steel or  CF Rinse Tank ( Acid)

Polyproylene  Polypropylene

 

EPS 1375 ELECTROPOLISHING SOLUTION Page 2 of 3

Continued from Page 1 :

CF Rinse Tank (Acid) Polypropylene Dilute Nitric Acid Tank

316 SS or Polypropylene

Electropolishing Tank (Acid) CF Rinse Tank (Acid)

316L Stainless Steel or _” or Polypropylene

1” PVDF (optional PVC liner)

Hot Water Rinse Tank (Acid)

316L Stainless Steel

The EPS TOTAL SYSTEM ELECTROPOLISHING LINE includes lab models,

manual lines, totally automated lines, including carousels and bulk processing equipment.

EPS SYSTEMS are modular in design so they can be adapted to your growing needs.

RACKS FOR PARTS

Racking is the most important consideration for excellent electropolishing results. Racks

that are used for EPS # 1375 should be copper with titanium clips. Racks should

preferably be coated with a thin layer of titanium, but PVC is preferred because it does

not rob any current from the work load.

ELECTROPOLISHING SOLUTION

The solution is ready to use out of the drum with the exception that 11 grams of

aluminum be dissolved in virgin E.P. bath before using. It should be pumped into the

tank, heated to the specific temperature and mixed thoroughly while dissolving the

aluminum. Take specific gravity at recommended temperature. Racks of work should be

cleaned and rinsed before being placed in the tank. Activate rectifier and adjust current

density for particular metal or alloy. Parts should sit in tank for 20-30 seconds before

rectifier is turned on to achieve a uniform oxide layer on the work. Run sample parts to

determine polishing time (usually 1-10 minutes). Rinse parts in drag-out tank after

polishing. From this tank are further rinsed and dried. If aluminum is to be

electropolished, voltage should be set between 18-40 volts. Altering the cathodic square

footage can control current density. To avoid etching or pitting, agitation should be set at

2-3 inch stroke of about 20 cycles per minute. Air agitation should also be used for a

brighter finish. As the bath is used and acquires dissolved aluminum, water may be

added.

 

EPS 1375 ELECTROPOLISHING SOLTION  Page 3 of 3

SOLUTION CONTROL

The bath is easily controlled by specific gravity and metal content.

SPECIFIC GRAVITY

Specific Gravity VS. Percent of metal at 700 Deg F

0% Metal 1.483

1%  1.493

2% 1.503

3% 1.513

4% 1.533

METAL CONTENT OF THE BATH

For best results, metal content of the bath should not exceed 2.8 percent by weight. Since

metal content, drag-in, drag-out, electrolysis and hydroscopic nature of the bath all effect

specific gravity; gravity should be tested regularly (once or twice daily). The metal

content does not generally change rapidly, and an analysis can be obtained for the EPS

lab or done in-house once per week.

PRODUCT SAFETY INFORMATION

Normal precautions must be taken. Goggles, glasses or face shield should be worn when

working near the tank. Protective acid-resistant clothing should be worn, including rubber

gloves and rubber boots. Shower and eyewash must be located near the tank. Safety Data

Sheets describing accident treatment procedures should be posted in the proper work

areas.

POLLUTION CONTROL

With EPS # 1375, the flowing rinse water should be treated by hydroxide precipitation,

ion exchange or other available technology.

ELECTRO POLISH SYSTEMS INC.

TOTAL SYSTEMS APPROACH

5678 W. Brown Deer Road

Milwaukee, WI 53223

Office (414) 357-8445 Fax (414) 357-8425