Gold coatings that meet demanding performance requirements

Anoplate runs a full series of gold baths that are specially formulated to plate with varying degrees of purity and hardness, as-required by the specific application or specification.

gold plating technologyAnoplate engineers and plating personnel have extensive experience in gold plating technology, strategies, and practical applications. Anoplate is fully capable of obtaining proper Gold plating adhesion over difficult-to-plate copper alloys containing zinc, beryllium, tellurium or lead.

Per MIL-DTL-45204, and following purity “Types” are associated with hardness “grades”:

Anoplate Term

Grade

Purity Type

Hardness*

“Hot” Gold

A

Type I and III

90 Max

“New” Gold

B

Type I and II

91-129

Purple Gold

C

Type I and II

130-200

Hard Gold

D

Type II

201 min

*Knoop, 25 gram-force load


SPECIFICATIONS

❖MIL-DTL-45204

❖ASTM B 488

❖AMS 2422


KEY ADVANTAGES

❖Corrosion and tarnish resistance

❖Bondability

❖Low and stable contact resistance

❖Solderability

❖Wear resistance

❖Infrared reflectivity

❖Wear resistance

❖No fretting degradation

GOLD BATHS AVAILABLE

“Hot” Gold: 24 Karat satin-bright deposit that is stress-free, fine grained and extremely ductile. This deposit has exceptional corrosion and heat-resistance, and has exceptional solderability, ever after prolonged storage.

Purple Gold: 23.9 Karat which co-deposits with metallic hardeners for added durability. Achieves a relatively low-stress deposit, is 99.7% pure, and results in a contact resistance of 4-7mΩ.

Hard Gold: Durable deposit is excellent for connector pins and shells that will see multiple mating cycles and need to withstand sheering forces. The resulting deposit has a lower coefficient of friction than any of the other grades.