Chemical Processes

Hard Anodize

What We Do

Hard Anodize

Electrochemical coating process for aluminum that creates a thick, dense porous aluminum oxide layer that is chemically bonded to the aluminum substrate. The anodic coating provides maximum hardness and wear resistance properties along with exceptional corrosion resistance and adhesive bonding properties.

Our process is engineered to maximize these performance properties of the coating while minimizing the risk of burning. Our proprietary sulfuric acid solution was designed to process 2000 series (2011, 2024, etc) and 7000 series (7075, 7050,etc) aluminum effectively by incorporating endothermic chemical additives and complex acid modifiers. The chemistry allows for minimal coating dissolution even when operating at higher current densities.

The PLC controlled rectifiers utilize automatic programs for each alloy and current density control unknown to most other companies offering anodizing. By analyzing the current and voltage patterns for every alloy we have been able to create recipes that eliminate the need for operator input and truly run ‘automatically’. Our process is capable of maintaining thickness tolerances +/-.0002” and ensure coating properties and color consistency.

We are experts in dye and seal innovation and have standard processes for all dye formulations and sealing technologies available to the industry.

Chemical Cleaning

  • Non-etching Alkaline Cleaning
  • Non-etching Acid Cleaning
  • Caustic Etching
  • Acid Etching
  • Etching/Desmutting for high silicon alloys
  • Electropolishing
  • Chemical Polishing
  • Ultrasonic Non-etching Alkaline Cleaning

Colors/Dyes

 

#2 Lime Green

anodized aluminum

 

#4 Green

anodized aluminum

 

#6 Forest Green

anodized aluminum

 

#7 Olive Drab

anodized aluminum

 

#8 Pink

anodized aluminum

 

#9 Berry

anodized aluminum

 

#10 Dark Pink

anodized aluminum

 

#11 Purple

anodized aluminum

 

#12 Lavender

anodized aluminum

 

#13 Raspberry

anodized aluminum

 

#14 Violet

anodized aluminum

 

#15 Violet 3D

anodized aluminum

 

#16 Turquoise

anodized aluminum

 

#18 Light Blue

anodized aluminum

 

#19 Aqua Marine

anodized aluminum

 

#20 Blue

anodized aluminum

 

#21 Navy Blue

anodized aluminum

 

#22 Peach

anodized aluminum

 

#24 Brown

anodized aluminum

 

#26 Gold

anodized aluminum

 

#28 Orange

anodized aluminum

 

#30 Red

anodized aluminum

 

#32 Clear

anodized aluminum

 

#34 Medical Gray

anodized aluminum

 

#36 Black

anodized aluminum

Gloss Adjustment

  • As Machined
  • Matte
  • Sating (semi-gloss)
  • Gloss

Sealing

  • Nickel Acetate Sealing
  • Trivalent Chromate Sealing
  • Magnesium Acetate Sealing
  • Hydrothermal and Mid Temperature Seals
  • Nickel Fluoride Sealing
  • Pre-seal accelerators
  • Lithium Acetate Sealing
  • Duplex Sealing Processes
  • Deionized Water Sealing
  • Triplex Sealing Processes
  • Sodium Dichromate Sealing
  • Silicate Sealing
  • Sol Gel sealing systems
  • Polytetrafluoroethylene (PTFE)

Featured Finishes

  • Blister free 7050 and 7075 hard anodizing
  • Burn free hard anodizing 2024 and other 2000 Series Alloys
  • Optimized cleaning cycles specific to each alloy and surface condition
  • Close tolerance (+/-.0002)
  • Compatible with all alloys

Quality Service for Engineered Performance Coatings.

Hillock Anodizing, Inc. is committed to the continuous improvement of all products and services and is determined to remain the quality leader in Hillock Anodizing, Inc’s field of expertise. Commitment to the goals of continuous improvement, customer-driven service, product quality, and employee involvement is of the utmost importance.