Hillock Anodizing

What Hillock Anodizing does

Hillock Anodizing, Inc. is a privately held, family-owned metal finishing services company founded in 1969 by John J. Hillock Sr. in Northeast Philadelphia, currently operating across two facilities totaling 38,000 square feet with 11–50 employees. The company specializes in sulfuric acid anodizing, Type III hard anodizing, chromate conversion coatings, passivation, and electroless nickel plating for aluminum, ferrous, and nickel-iron alloy components, supported by in-house masking, mechanical finishing, part marking, sealing, and a 25+ color dye library. Its core technical differentiation is a portfolio of proprietary Performance Anodic Coatings — Steriscreen, Steridize, Stericlave, STERI-X, HC 43A, and HC 55 — engineered for medical sterilization, extreme corrosion resistance, and high-wear environments, plus the ENvar process for Invar plating and the Titan 3D process for passivating 3D-printed titanium implantable components.

The firm holds NADCAP AC7108 (Chemical Processing) and AC7004 (Quality System) accreditation, AS9100/ISO 9001 certification, ITAR registration, and process approvals to MIL-A-8625, MIL-DTL-81706, AMS 2482, and ASTM A967. It is an approved vendor with every major U.S. aerospace and defense prime (Lockheed Martin, Boeing, GE Aviation, Raytheon, L3Harris, General Dynamics, BAE Systems, Rockwell Collins) and major Tier 1 suppliers (Parker Hannifin, Hamilton Sundstrand, Triumph Group, Meggitt, Eaton, MRAS, Martin Baker, Augusta Westland), with additional relationships in medical (DePuy Synthes), government (NASA), and industrial/precision-instrument segments.

The business operates a direct, quote-based sales model with a stated 72-hour quotation turnaround, serving aerospace, military/defense, medical, semiconductor, industrial, printing, and commercial manufacturing customers. Revenue mechanics are project-based part finishing rather than recurring subscriptions, with pricing driven by part geometry, specification, and chemistry selection; no public pricing tiers or ARR-style metrics are disclosed. The second and third generation Hillock family retains ownership and operational leadership.

Name

Hillock Anodizing

Legal name

Hillock Anodizing, Inc.

Website

https://hillockanodizing.com

Company type

Private

Founded year

1969

Operating status

Operating

Headcount range

11–50 employees

Short description

Hillock Anodizing is a NADCAP-accredited, family-owned metal finishing services company founded in 1969 in Philadelphia, providing specialized anodizing, passivation, and proprietary Performance Anodic Coatings to aerospace, defense, medical, and industrial manufacturers.

Ownership category

akta.pro rank

Product category

Metal Finishing & Anodizing Services

NAICS

Electroplating, Plating, Polishing, Anodizing, and Coloring (332813)

SIC

Paints, Varnishes, Lacquers, Enamels & Allied Prods (2851)

akta.pro industry

PRIMARYIMAIAKAE

Electroplating & Metal Finishing (Anodizing/Galvanizing/Passivation)

Industrials, Manufacturing & Construction/Industrial Services & Facility Operations/Industrial & Commercial Painting, Coating & Surface Treatment

SECONDARYIMAKACAI

Aluminum Fabrication & Finishing (Machining, Anodizing, Coating)

Industrials, Manufacturing & Construction/Metals & Mining/Aluminum (Bauxite, Alumina & Primary/Secondary Smelting)

Keywords

• Anodizing services
• Metal finishing
• Surface treatment coatings
• Electroless nickel plating
• Chromate conversion coatings

Headquarters

HQ city

Philadelphia

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Metal Finishing Services: One-time service-based metal finishing and anodizing services for aluminum and metal components. Services include sulfuric acid anodizing, hard anodizing, chromate conversion coatings, passivation, and electroless nickel plating. Pricing based on project scope and specifications.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Hillock Anodizing provides engineered performance coatings and metal finishing services for aluminum, ferrous, and nickel-iron alloy components. Core offerings include sulfuric acid anodizing, hard anodize, chromate conversion coatings, passivation, and electroless nickel plating, plus a proprietary portfolio of Performance Anodic Coatings (Steriscreen, Steridize, Stericlave, STERI-X, HC 43A, HC 55) engineered for extreme corrosion resistance, sterilization compatibility, and wear resistance.

Product overview

Hillock Anodizing provides engineered performance coatings and metal finishing services through a portfolio of core chemical processes and proprietary performance anodic coatings. The company operates as a NADCAP-accredited metal finishing facility serving aerospace, military/defense, medical, industrial, semiconductor, printing/packaging, and commercial sectors. The core chemical processes include Sulfuric Acid Anodizing, Hard Anodize, Passivation, Chromate Conversion Coatings, and Electroless Nickel plating. The proprietary Performance Anodic Coatings portfolio includes Steriscreen, Steridize, Stericlave, STERI-X, HC 43A, and HC 55—specialized coatings engineered for extreme corrosion resistance, sterilization compatibility, and enhanced durability in demanding environments. Supporting capabilities encompass sealing services, color/dye options (25+ colors), gloss level adjustment, chemical cleaning, precision masking, mechanical finishing, part marking, and custom engineering/process development. The company operates two facilities totaling 38,000 square feet in Northeast Philadelphia.

Differentiator

Problem solved

Functional benefit

Brands

• Steriscreen: Anodize process with alkaline resistance and adhesion promoting properties, validated for medical applications with epoxy printed graphics.
• Steridize
• Stericlave
• STERI-X
• HC 43A
• HC 55
• ENvar
• Titan 3D

Products and services

• Sulfuric Acid Anodizing Standard anodizing process using sulfuric acid electrolyte, compatible with all aluminum alloys. Available in clear, black, and custom colors with multiple sealing options. Used for aerospace, military, medical, and industrial components requiring validated corrosion protection.
• Hard Anodize Type III hardcoat anodizing providing enhanced surface hardness and wear resistance. Available in clear, black, and custom colors; can be unsealed or sealed (PTFE available). Used for components requiring MIL-A-8625 Type III hardcoat specifications.
• Passivation Surface treatment process for stainless steel and other alloys using citric acid or nitric acid to enhance corrosion resistance. Used for medical implants, aerospace fasteners, and industrial stainless components.
• Chromate Conversion Coatings Coating applied to aluminum to increase corrosion resistance and surface adhesion properties. Available in non-RoHS gold and clear chromate, or RoHS Trivalent Chromate. Meets MIL-DTL-81706 specifications.
• Electroless Nickel Mid-phosphorous electroless nickel plating for aluminum, ferrous alloys, and nickel-iron alloys (Invar). Provides uniform coating thickness and wear resistance for semiconductor, aerospace, and industrial components.
• Steriscreen Proprietary anodize coating meeting MIL-A-8625 Type II with alkaline resistance and adhesion promoting properties. Uses special pulsed voltage sequence to increase porosity for better bonding of organic materials. Validated for medical applications with epoxy printed graphics.
• Steridize Performance anodize coating with extreme corrosion resistance and organic dye light fastness enhancing properties. Advanced Pore Closure Anodize System using complex pulsing rectifier programs for medical industry applications.
• Stericlave Original performance anodic coating for the medical industry offering maximum corrosion resistance, light fastness, chemical resistance, Sterrad resistance, and autoclave resistance properties. Advanced pore closure anodize system.
• STERI-X Ultra pure anodic coating process using proprietary chemical solution and complex electric waveform to dissipate heat and impurities. Provides self-ordered aluminum oxide coating capable of withstanding extreme corrosive environments.
• HC 43A Self-lubricating, anti-galling hard anodize process with electrolytically deposited organic molecules in aluminum oxide matrix. AMS 2482 compliant hardcoat with PTFE. Used for printing rollers, packaging machinery, and sliding industrial components.
• HC 55 Hard anodize process with minimal surface roughness increase that can be dyed vibrant colors. Self-ordered pore structure allows greater sealability and better corrosion resistance than conventional Type III hard anodize processes.
• ENvar Process Proprietary process ensuring superior adhesion of electroless nickel/phosphorus deposit to Invar (nickel-iron super alloy). Separate plating cell at Comly location developed for this material.
• Titan 3D Passivate Validated passivation process for 3D printed titanium implantable components meeting ASTM A967 requirements while eliminating discoloration from heat treatment. Used for medical implant applications.

Quantifiable outcome

• Proven to withstand 100+ sterilizing cycles consisting of 10 minute immersion in 12.5+ pH detergent followed by steam autoclave
• +2 more outcomes

Named customers19 records

Segments7 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

18 partnerships are on record, tiered core.

• Lockheed MartincoreTechnology or IntegrationPrime contractor approval for aerospace and defense metal finishing. Hillock Anodizing has earned process approvals from Lockheed Martin for anodizing and metal finishing services.
• BoeingcoreTechnology or IntegrationPrime contractor approval for aerospace manufacturing metal finishing. Approved vendor for Boeing supplier requirements.
• GE AviationcoreTechnology or IntegrationPrime contractor approval for aerospace engine components metal finishing.
• L3Harris TechnologiescoreTechnology or IntegrationPrime contractor approval for aerospace and defense communications equipment finishing.
• General DynamicscoreTechnology or IntegrationPrime contractor approval for defense systems components finishing.
• BAE SystemscoreTechnology or IntegrationPrime contractor approval for aerospace and defense equipment finishing.
• RaytheoncoreTechnology or IntegrationPrime contractor approval for defense and aerospace systems finishing.
• Rockwell CollinscoreTechnology or IntegrationPrime contractor approval for avionics and aerospace electronics finishing.
• Martin BakercoreTechnology or IntegrationPrime contractor approval for aerospace safety equipment ejection seat components.
• Parker HannifincoreTechnology or IntegrationApproved vendor for aerospace and industrial components finishing.
• DePuy SynthescoreTechnology or IntegrationMedical device manufacturer approval for biocompatible metal finishing on medical devices and components.
• Triumph GroupcoreTechnology or IntegrationApproved vendor for aerospace components finishing.
• Hamilton SundstrandcoreTechnology or IntegrationApproved vendor for aerospace components finishing.
• MRAScoreTechnology or IntegrationApproved vendor for aerospace structures components finishing.
• Augusta WestlandcoreTechnology or IntegrationApproved vendor for helicopter components finishing.
• EatoncoreTechnology or IntegrationApproved vendor for industrial and aerospace components finishing.
• SNCcoreTechnology or IntegrationApproved vendor for defense and aerospace systems finishing.
• MeggittcoreTechnology or IntegrationApproved vendor for aerospace components finishing.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• SIFCO Industries: Cleveland-based publicly traded (NYSEMKT: SIFCO) provider of selective anodizing, plating, and surface finishing for aerospace OEM and MRO customers. Comparable in NADCAP-accredited aerostructures focus and proprietary selective plating technology for in-field repairs.
• Master Finish Company: Grand Rapids, MI-based anodizer and metal finisher (since 1948) with NADCAP-accredited Type II/III anodizing, hardcoat, chromate conversion, and passivation for aerospace, medical, and industrial customers. Comparable specialty mid-market positioning.
• Anoplate Corporation: Syracuse, NY-based NADCAP-accredited metal finisher offering anodizing (Type II/III), passivation, chromate conversion, electroless nickel, and precious-metal plating to aerospace, defense, medical, and semiconductor primes. Most direct comparable in scale, certification stack (NADCAP, ITAR, AS9100), and proprietary coating portfolio.
• Pioneer Metal Finishing: Multi-site US metal finisher (anodizing, plating, powder coating, passivation) serving aerospace, defense, medical, and industrial customers. Same NADCAP/ITAR/AS9100 stack and much larger footprint - useful scale benchmark for what a roll-up of Hillock's footprint could look like.
• ASCO Aerospace Surface Coatings: NADCAP-accredited aerospace finishing shop focused on chromate conversion, anodize, and passivation for OEM and tier-one aerospace suppliers. Highly comparable certification moat and prime-contractor customer base.
• Hohman Plating & Mfg: Dayton, OH-based NADCAP/ITAR-registered metal finisher offering anodizing, electroless nickel, hardcoat, and passivation to aerospace and defense customers. Comparable specialty chemistry capabilities and DoD-skewed customer roster.
• Techmetals Inc: Ohio-based NADCAP-accredited anodizer and metal finisher serving aerospace, defense, medical, and industrial customers. Direct competitor for hardcoat, sulfuric acid anodizing, chromate conversion, and electroless nickel work on aluminum and titanium alloys.
• Bowers Manufacturing Company: Indiana-based precision metal finisher specializing in anodizing, hardcoat, and chemical film for aerospace and industrial customers. Comparable in NADCAP certification approach, family-owned operating profile, and emphasis on hard-to-process aluminum alloys.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/hillock-anodizing

Compliance10 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Hillock Anodizing