| TREATMENT |
APPLIED ON |
PURPOSE |
SPECIFICATION |
|
|
Nonferrous and
ferrous metals, nickel under-coating |
Corrosion and
tarnish resistance, low and stable contact resistance,
solderability and wear resistance |
MIL-G-45204C
Type I: 99.7% min.
Type II: 99.9% min.
Grade A to C
Classes 00 à 6
ASTM B488-86
Type 1: 99.9% min.
Type 2: 99.7% min.
Code A to C
Classes 0.25 à 40 |
|
|
Aluminum and
alloys |
Durable,
protective and decorative coating.
Nonconductive.
Available in clear, black, blue and red. |
MIL-A-8625 Type
II
Class I (non dyed)
Class II (dyed)
ASTM B580-79;
Type B to F;
NT 493, NT494 |
|
|
Steel |
Corrosion
control or paint primer.
Type I (no chromate)
Type II (yellow chromate)
Type III (clear chromate) |
ASTM B766-86
Class 5 (thin) to
Class 25 (thick);
QQ-P-416,
TypeI,II and III;
NT559, NT 660 |
|
|
Aluminum and
alloys |
Corrosion
control or paint primer.
Conductive (Class 3) and nonconductive (Class 1a).
Normally irridescent yellow, clear if required. |
MIL-C-5541
Class
1A (max. protection)
or Class 3 (max conductivity);
ASTM B449-6a (1993);
NT1842A |
|
|
Plated zinc and
zinc die cast |
Corrosion
control or paint primer.
Normally yellow, but could be bleached. |
MIL-T-12879
Type
II, yellow;
NT516 |
|
|
Copper alloys
(Brass, beryllium copper and alloy 725) |
Used for
undercoating to eliminate zinc migration into tin, tin-lead
or silver coating. |
MIL-C-14550
Class
0 to 4;
ASTM B734-84
Class 5 to 25;
NT560A |
|
|
Nonferrous and
ferrous metals |
Decorative,
wear resistant, moderate corrosion protection. Used for
undercoating. |
MIL-C-26074
grade A or B
Class 1 to 4;
ASTM B733-90
Class 1 to 25;
NT1918 |
|
|
Nonferrous and
ferrous metals |
Durable,
moderate corrosion protection. |
MIL-P-27418
up to 0.002 inch;
NT31A |
|
|
Stainless steel |
Removes iron
particles from surface to reduce corrosion. |
QQ-P-35
Type VI;
NT662 |
|
|
Nonferrous
metals or copper or nickel flash |
Decorative,
conductive, corrosion resistance, lubricity. |
QQ-S-365
type III wiyh organic brightener,
grade A (with) or
grade
B (without) chromate;
NT 475 |
|
|
Nonferrous and
ferrous metals |
Improves
solderability and conductivity; bright tin is less porous. |
MIL-T-10727
Type I (electro-deposited);
ASTM B545-92;
Class A to E (0.0001 to 0.0012 inches);
NT560 |
|
|
Nonferrous and
ferrous metals |
Improves
solderability and conductivity; at 2% of lead eliminates
whisker growth. |
NT786
bright or
matte finish;
88-98% tin & 2-12% lead, 0.0002 inches minimum |
|
|
Steel |
Corrosion
control or paint primer.
Type I (no chromate)
Type II (yellow, olive drab and black chromate)
Type III (clear chromate) |
ASTM B633
Class SC1 (thin) up to Class SC4 (thick);
NT289A |
