Chemical Conversion Coating

West-Tech Finishing Inc. provides chemical conversion coating, commonly known as chem film or Alodine, for aluminum components that require corrosion protection, electrical conductivity, or a dependable surface for paint, primers, and adhesives.

West-Tech processes chemical conversion coating to MIL-DTL-5541 Type 1, Class 1A and Class 3, and MIL-DTL-5541F Type II. Type II coatings are REACH/RoHS compliant. Each job is processed to the drawing, alloy, class, masking requirements, and applicable specification.

Our chemical conversion tank measures 90 in × 54 in × 22 in, giving West-Tech the capacity to handle a broad range of component sizes and production quantities. We also offer brush touch-up for localized areas exposed by machining, modification, or rework, allowing customers to restore protection where it is needed without unnecessarily reprocessing the entire component.

Standard lead time is typically 4 to 5 business days, with expedited service available when production schedules require faster turnaround. Our Nadcap accreditation and AS9100 Rev D and ISO 9001:2015 registered quality systems provide additional confidence for demanding aerospace, defence, and industrial programs.

For an accurate quote, include the aluminum alloy, required class, applicable specification, masking requirements, part dimensions, quantity, and any brush touch-up requirements with your RFQ.