Magnesium, Aluminum and Plastic Coatings

Alloy Metal Finishing, LLC

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Pretreatments & Pretreating Alloys

Pretreatment Products

Pretreating alloys is the best way to achieve a perfect surface for painting and coating. We offer a range of magnesium and aluminum pretreatments. Our high-quality processes make the whole process extremely cost-effective. All our coatings meet the MIL-DTL-81706B standard and include multiple RoHS-compliant options.

Alodine 5200

  • RoHS-Compliant Coating
  • Chromium-Free Product Specifically for Treating Non-Ferrous Alloys
  • Excellent Base for the Bonding of Adhesives & Organic Finishes
  • No Toxic Fluorides
  • Electrically Conductive (It Is Chrome-Free)

Alodine T-5900

  • RoHS-Compliant Coating
  • Trivalent Cr III System
  • Used When You Need Electrical Conductivity
  • Excellent Conductivity with Aluminum
  • Reacts Slightly Better Than the Base Metal Magnesium for Conductivity


We provide passivation services to all 300-series austenitic stainless steels and many more. Alloy processes are performed to meet the requirements of the QQ-P-35 and A-967-05 standards. Certification is available upon request. Please contact us for assistance with your specific requirements.

Process Definition

Passivation is a chemical process that removes sulfides and ferrous materials from the surface of stainless steel. However, if the product is touched by a ferrous material after processing, it nullifies the passivation process.

Benefits of Passivation

  • Maximizes Corrosion Resistance
  • Removes Surface Contamination from Machined & Peened Parts
  • Removes Exposed Sulfides from the Surface of Stainless Alloys (Which Can Act as Corrosion Initiation Sites on the Surface of the Fabricated Product)