Quality Control

Our In-house Laboratory Allows Us To Conduct Tests Daily & To Make Corrections For Optimum Performance. For Our Customers, This Means Consistent Quality & On Time Delivery.

We Have The Latest Equipment & A Sophisticated In-house Laboratory. But It Is Our People That Really Make The Difference. They Have The Experience & Expertise To Handle A Variety Of Finishing Needs In A Timely Manner. They Maintain Hands-on Control Of Every Job. And They Care About Your Business.

You Need Quality You Can Depend On. At ARNOLD’S METAL FINISHING We Guarantee High Quality Through Tight Control Of Our Processes.
Our In House Laboratory Allows Us To Conduct Tests Daily & To Make Corrections For Optimum Performance. For Our Customers, This Means Consistent Quality & On Time Delivery.A Quality Inspection Station Tests Parts After The Anodizing Or Chemical Brightening Process To Ensure That They Meet Or Exceed All Specifications, Military (mil-spec) To Commercial

Arnold’s M F Chemists Maintain Tight Tolerance Controls On Waste Streams And Process Baths To Assure Not Only Quality Anodic Coatings, But Environmental Compliance.Through Various Process Controls Coil Anodizers Are Able To Monitor And Control The Correct Anodized Coating For Your Application.

Quality Criteria

  • Anodize Film Thickness
  • Anodize Film Uniformity
  • Anodize Film Density
  • Abrasion Resistance
  • Corrosion Resistance
  • Fade Resistance
  • Reflectivity
  • Image Clarity
  • Insulative Properties
  • Adhesion
  • Sealing



We Know That Often A Finished Product Isn’t Finished Without Proper Surface Preparation, So We Have The Equipment And The Manpower To Do The Job Right.


Anodizing Is An Electrochemical Conversion Process, Not An Applied Coating. The Surface Of The Aluminum Metal Is Converted To Aluminum Oxide As A Result Of Reactions Occurring At The Anode In A Acidic Solution. The Thickness And Properties Of The Anodic Coating Will Vary With Alloy, Anodizing Process Utilized And Cycle Time (ampere-hours).


Type II Sulfuric Anodizing Provides These Surface Attributes:

  • Corrosion Resistance (336+ Hours Salt Spray Resistance Per ASTM B117)
  • Moderate Durability
  • Excellent Dyability (yielding Deep, Rich Colors)
  • Electrical Insulation


Hot Water Seals Produce The Clearest Sulfuric Anodize While Sodium Dichromate Yields A Yellow-green Appearance But Is Generally A Better Seal.


  • Cost Effective
  • Fast Turnaround Time
  • Anodizing To Military Specifications (mil-spec Anodized)
  • High Volume Capacity
  • Small To Medium Size Parts
  • In Addition To Specializing In Aluminum Anodizing, Chemical Film And Bright Dip Anodizing, IMP Offers Silk Screen Printing, Pad Printing, Laser Engraving, Assembly And Packaging For All Anodized Products.

Unlike Paint, Which Can Flake Off If Not Applied Properly, Anodized Aluminum Finishes Are Actually Formed From The Original Material And Cannot Flake Off.


  • Electropolishing System Works It's Wonders By Smoothing, Polishing, And Deburring Metal Surfaces In An Electrolytic Bath. 
  • Removes High Points On The Metal Surface While Producing A Uniform High Luster On The Metal Surface. 
  • Metal Part Is Immersed In A Liquid Media And Subjected To Direct Current. 
  • The Metal Part Is Made Anodic (+) And A Metal, Usually Lead, Copper. Or Stainless Steel, Is Made Chathodic (-). 
  • The Direct Current Flows From The Anode To The Cathode Removing Metal Ions At A Controlled Rate. 
  • The Amount Of Metal Removed Is Dependent Upon The Specific Bath, The Temperature, Speed, And The Particular Alloy Being Electropolished. 
  • Unlike Conventional Mechanical Finishing Systems. This Process Does Not Smear, Bend, Stress Or Fracture The Crystalline Metal Surface To Achieve Smoothness Or Lustre.
  • Removes Metal From The Surface Producing A Unidirectional Pattern That Is Stress And Occlusion-free, Microscopically Smooth, And Often Highly Reflective. 
  • Improves Corrosion Resistance And Passivity Are Achieved On Many Ferrous And Some Nonferrous Alloys. 
  • Used For Micro- And Macro-deburring, As This Reverse Plating Process Selectively Removes Metal Ions From The High Points On The Surface Without Etching It.


Electropolishing Works By An Electro-chemical Reaction In Which Metal Dissolves Faster At Surface Micro Peaks, Creating A Leveling Effect On The Surface Of The Work Piece. This Process Makes Electropolishing An Excellent Option For Deburring And General Preparation Of Stainless Steel Surfaces Prior To Plating.


A Rush Job? A Large Job? Our Capacity For Both Volume & Variety Means That We Can Quickly Meet Your Special Needs. We Handle Thousands Of Pieces Daily & Can Rapidly Increase Our Capacity To Accommodate Customers' Needs. Our Fleet Of Trucks Insures Prompt Pick-up & Delivery.