Item |
Surface Treatment |
Feature |
Application |
1 |
Anodize ( Black /Clear) |
Good for tight tolerance parts: will not change dimensions Corrosion protection Good for Bonding Non-Conductive |
Boric-Sulfuric Acid Anodize Applications: Precision Machined Components Aerospace/Aircraft Components As a paint/prime base
Sulfuric Acid Anodize Applications: Optical components Hydraulic valve bodies Military weapons Computer and electronic enclosures Mechanical hardware |
2 |
Hard anodize ( Black /Clear) |
Improved wear resistance Non-conductive Can repair worn surfaces on aluminum Improve parts surface for slide applications Can be black dyed; other colors less decorative Finish is harder than tool steel Can be ground or lapped |
Valves Pistons Sliding Parts Hinge Mechanisms Cams Gears Swivel Joints Insulation Plates Blast Shields |
3 |
Chromate |
Tight-tolerance features |
Grounding paths for electronic components Paintable surfaces for prime or dry-film lubricants |
4 |
Passivation |
Stainless steel does not have to be plated to achieve maximum corrosion protection. Provides a superior clean surface No rust discoloration of the stainless steel when in service. Passivated stainless steel will not react with other materials because of iron contamination. |
Mixers, tanks, handling equipment, shielding, and fasteners and aerospace fuel system controls |
5 |
Polish |
Invasive surgical instruments and medically-invasive surgical instruments and bone plates. Removes impurities inherent in the machining/bending/welding process Relieves stresses in the part imparted by coldworking or machining |
Medical implants & devices Food processing & handling equipment Pharmaceutical/laboratory equipment Gears & splines |
6 |
Electroless nickel plating |
Corrosion resistance Wear resistance Uniform coverage throughout part Tight control of deposit thickness No post machining needed |
Valves Pumps Splines Gears Hydraulic Pistons Molds Cutting Knives |
7 |
Zinc plating |
Corrosion resistance Wear Resistance Appearance Lubricity Solderability |
Military weaponry Medical diagnostic instruments Optics Tools and dies Aircraft components Machine components Electronics & computer devices Enclosures, chassis and heat sinks Mechanical assemblies |
8 |
Chrome |
Improved wear resistance Non-conductive Can repair worn surfaces on aluminum Improve parts surface for slide applications Can be black dyed; other colors less decorative Finish is harder than tool steel Can be ground or lapped |
Valves Pistons Sliding Parts Hinge Mechanisms Cams Gears Swivel Joints Insulation Plates Blast Shields |
9 |
Hard chrome |
Corrosion resistance Wear Resistance Appearance Lubricity Solderability |
Military weaponry Medical diagnostic instruments Optics Tools and dies Aircraft components Machine components Electronics & computer devices Enclosures, chassis and heat sinks Mechanical assemblies |
10 |
Silver plating |
Corrosion resistance Wear Resistance Appearance Lubricity Solderability |
Military weaponry Medical diagnostic instruments Optics Tools and dies Aircraft components Machine components Electronics & computer devices Enclosures, chassis and heat sinks Mechanical assemblies |
11 |
Gold Plating |
Corrosion resistance Wear Resistance Appearance Lubricity Solderability |
Military weaponry Medical diagnostic instruments Optics Tools and dies Aircraft components Machine components Electronics & computer devices Enclosures, chassis and heat sinks Mechanical assemblies |