Type III Hardcoat Hard Anodizing Services

ISO AS9100 RoHS compliant integrated CNC hard anodizing with PTFE impregnation for high-wear aerospace and medical aluminum components.

ISO 14001:2015       ISO 9001:2015        IATF 16949:2016


ISO AS9100 Hard Anodize With In-House CNC Machining

CustomParts-MFG specializes in MIL-A-8625 compliant Type III hardcoat hard anodizing paired with full in-house 3/4/5 axis CNC machining, holding ISO9001, AS9100, RoHS & REACH certification. Our low-temperature electrochemical hard anodize grows dense ceramic-like aluminum oxide layer at 60~70HRC hardness, precisely controlling coating thickness from 0.0005” to 0.003” per side. Supported by custom selective masking, strict batch testing and integrated post-treatment, our hardcoat solution serves aerospace, automotive, medical, robotics and industrial machinery for components operating under high-friction and corrosive harsh environments.



Core Functional Advantages of Hardcoat Hard Anodizing

  • Ultra-High Hardness & Abrasion Resistance: 60–70 Rockwell C hardness effectively avoids galling and heavy wear for long-cycle moving aluminum parts.
  • Superior Chemical & Salt Spray Corrosion Barrier: Thick compact non-conductive oxide layer withstands chemical erosion and long-term outdoor harsh working conditions.
  • Excellent Electrical & Thermal Dielectric Insulation: Reliable isolation property ideal for electronic insulation and thermal isolation components.
  • Dimension Stability & Long Service Life: In-situ grown coating minimizes dimensional expansion, retains original precision tolerance and cuts equipment maintenance & replacement expense.
  • Ideal Underlayer for Secondary Finishing: Uniform porous surface provides outstanding adhesion base for paint, primer and PTFE impregnated lubrication coating.



Applicable Aluminum Alloy Grades & Design Guidance

Applicable Aluminum Alloy Grades & Design Guidance

  • Available Alloys: 2000, 6000 and 7000 series aerospace & industrial aluminum alloys; alloy silicon content and material temper directly affect final hardcoat quality, our engineering team provides pre-production material consultation.
  • Custom Pre-Process Options: Precision pre-machining, bead blast, polishing and custom masking to shield critical threads, inner bores and fitting surfaces from coating buildup.

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Standard In-house Controlled Hardcoat Production Process

Precision Pre-Cleaning & Surface Preparation

Complete degreasing and deoxidation to eliminate surface contaminants, laying foundation for uniform oxide layer adhesion.

Low-Temperature Electrochemical Oxidation

Special formulated bath with real-time closed-loop monitoring on temperature, current density and electrolyte composition to form dense hard ceramic oxide film complying with MIL-A-8625 Type III specs.

Custom Sealing & Optional Post Treatment

Select regular hot sealing or PTFE impregnation for extra self-lubrication performance based on end-use requirement.

Full-Spec Multi-Item Batch Inspection

Non-destructive & destructive thickness test, ASTM B117 salt spray, hardness verification and full dimensional check before shipment.

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Standard In-house Controlled Hardcoat Production Process
Key Hard Anodizing Industry Application

Key Hard Anodizing Industry Application


  • Aerospace & Defense: Landing gear fittings, hydraulic valve bodies and aircraft precision actuator components.
  • Automotive & Racing Parts: Engine pistons, transmission assemblies and high-load suspension aluminum components.
  • General Industrial Machinery: Wear-resistant plates, rolling rollers and hydraulic cylinder barrel parts.
  • Medical Devices: Clean-grade surgical tool bodies and precision imaging equipment structural parts compliant with hygiene standards.
  • Robotics & Automation: Reciprocating gears, linear motion guides and robotic end effector housings.


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Integrated One-stop Full-service Superiority


  • All production in-house: From multi-axis CNC blanking, selective masking, hardcoat processing, post-finishing to cleanroom packaging without third-party outsourcing.
  • Unified procurement management: Single purchase order, one invoice and centralized quality certification to simplify client supply chain management.
  • Flexible delivery cycle: 5–10 working days for standard orders, 10–15 days for mass bulk production; expedited rush service available for urgent prototype projects.


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Integrated One-stop Full-service Superiority
Request Free Custom Hardcoat Anodizing Quotation

Request Free Custom Hardcoat Anodizing Quotation

Upload CAD drawings, alloy info and coating requirements via quote page, our surface engineering team sends DFM analysis and tailored quotation within 24 working hours.

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Why Specify Hardcoat Anodizing?

When standard anodizing isn’t enough, our Hard Anodize (Hardcoat) process provides the ultimate surface solution for precision metal parts. We go beyond aesthetics to engineer functional performance:

  • Extreme Wear & Abrasion Resistance: Creates the hardest surface layer of any anodizing type, significantly outlasting standard finishes.
  • Superior Corrosion Protection: A dense, thick oxide layer acts as a formidable barrier against harsh environments.
  • Excellent Dielectric & Thermal Insulation: The non-conductive coating provides reliable electrical isolation and heat resistance.
  • Permanent & Integral Coating: Unlike plating, Hardcoat is grown from the base aluminum, so it won’t chip, flake, or peel.
  • Maintains Precision: Our controlled process ensures minimal dimensional growth, preserving your tight part tolerances.

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Why Specify Hardcoat Anodizing?

FAQs About Hard Anodize

What is hardcoat hard anodizing?

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A: Low-temperature electrochemical treatment growing thick high-hardness oxide coating on aluminum alloy, boosting wear, corrosion and insulation for high-demand precision industrial components.

What aluminum alloys support hard anodize processing?

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A: Mainly 2000/6000/7000 series aluminum; our engineers evaluate alloy composition to confirm processing feasibility before quotation.

Which industries widely adopt hardcoat anodized components?

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A: Aerospace, auto racing, defense, industrial robotics, semiconductor fixture and marine outdoor equipment industries.

What documents and specs are required for formal quotation?

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A: STEP/IGES CAD drawing, aluminum grade & temper, target coating thickness, masking area and applicable industry standard (MIL-A-8625/AMS2469).

What is standard hard anodize production lead time?

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A: Regular order 5~10 business days after sample confirmation, urgent orders support expedited schedule.

Do you provide pre/post processing auxiliary services?

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A: Custom pre-masking, pre-etching, post-sealing, PTFE impregnation and full batch test certification included.