SMI Inc.

SCIENTIFIC MATERIAL INTERNATIONAL

12219 SW 131 Avenue Miami, Florida 33186-6401 USA

Phone (305)971-7047 Facsimile (305) 971-7048

Attn: Larry Holt Date: 28-Aug-1995
Holt International LLC
1060 Yaple Rd. SMI/REF: 9508002-R
Kingston, OH 45644 Reissued for name change only.

Product: E-Z Grip (Marine Formula) (rec'd 16-Aug-1995)

Dilution: As received (shaken well before testing) Page 1 of 2

TOTAL IMMERSION CORROSION

per ASTM F 483

  1. PROCEDURE
    1. Weigh three of four specimens of the same alloy to the nearest 0.1 mg.
    2. Immerse three weighed specimens of each alloy in the solution at the prescribed temperature. Place only specimens of the same alloy in the containing vessel. Maintain at the required temperature for the prescribed exposure period. Retain the fourth specimen of each alloy for comparison purposes.
    3. At the end of the 24 hours remove the test specimens and proceed as follows:
      1. Rinse thoroughly under hot tap water, 49 to 60° C. Follow with a rinse in water conforming to ASTM D 1193, Type IV at room temperature.
      2. Rinse with a stream of acetone from a wash bottle and oven dry at 120° C, desiccate until cooled to ambient, weigh and record.
      3. Then examine for and record the following visible changes in comparison with the fourth virgin specimen of each alloy.
        1. Discoloration and dulling
        2. Etching
        3. Presence of accretions and relative amounts
        4. Pitting
        5. Presence of selective or localized attack
    4. Immerse the panels in the same test solution for a further 144 hours, then repeat 9.3.1 through 9.3.3.5.

 

Alloy

Wgt Loss

(mg per 1x2 inch panel)

WGT LOSS

mg/cm2/24hrs

AFTER 24HRS

AFTER 168HRS

AMS 4041 Clad Aluminum

0.4 mg

0.2 mg

< 0.01

AMS 4049 Clad Aluminum

0.3 mg

0.3 mg

< 0.01

AMS 4376 Magnesium

dichromate treated

per MIL-M-3171 Type III

 

+ 0.6 mg

 

+ 0.6 mg

 

< 0.01

No visible corrosion or attack on any of the above alloys.

Respectfully submitted,

 

Patricia D. Otero, SMI Inc.