NEWS

FREE PICK UP and DELIVERY
BEXAR COUNTY

With our commitment to uphold the highest quality standards in the plating process, along with the desire to increase service to our clients, we provide FREE pick up and delivery for orders $250 or more within Bexar County.

Pick Up and Delivery Schedule:
Monday / Tuesday / Thursday

 

Call for Pick Up
210-661-2738

Passivate Services

 

A process designed to remove foreign metals from the surface of stainless and corrosion resistant steels and to promote natural tendency of surface to oxidize. Does not change the appearance of the base metal. Process purifies surface and therefore improves corrosion resistance.

 

Specification Thickness Comments
AMS-P-35 No dimensional
change
 
Type II No dimensional
change
Medium temperature with sodium dichrominate.
Type VI No dimensional
change
Low temperature
Type VII No dimensional
change
Medium temperature
Type VIII No dimensional
change
Medium temperature with high concentration of nitric acid.
    24 hour humidity test required. Salt spray test may be required, if specified, in addition to humidity test.
ASTM-A-967-99el**   **Alternate spec to supercede QQ-P-35. In addition to passivate using Nitric acid (and Sodium Dichromate), this ASTM also introduces passivation using Citric acid which at the present time, Alexandria Metal Finishers does not perform.
    Nitric Acid
(Vol. %)
Sodium Dichromate
(Weight %)
Nitric 1 120°-130°F
20 min.
20-25 2.5 + 0.5
Nitric 2 70°-90°F
50 min.
20-45 none
Nitric 3 120°-140°F
20 min.
20-25 none
Nitric 4 120°-130°F
30 min.
45-55 none

 

Request a Quote 20-ft tanks available!
Contact Info

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Warner's Metal Finishing, Inc.

7020 FM 2538
Marion, Texas 78124

 

Phone: (210) 661-2738
Fax: (210) 649-1950

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