Surface finishes


Chemical transformation film services

Chemical conversion coatings are mainly used for metal anti-corrosion and wear resistance. The conversion film also has good paintability and can be used as the bottom layer of organic coatings; during cold processing, the conversion film layer can lubricate and reduce wear, allowing the workpiece to withstand higher loads.

  • chemical conversion coating parts
  • chemical conversion coating
  • Setec 650 parts
  • Approval

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Part surface treatment

Aluminum & magnesiumchemical transformation film

  • Chemical conversion film of aluminum and aluminum alloy (MIL- DTL-5541F) is in oxidizing chemical conversion solution, the process in which the surface of aluminum reacts with the chemical oxidizer in the chemical conversion solution to form a chemical conversion film.

  • Chemical conversion film of magnesium and magnesium alloy (AMS-M-3171) is chemically or electrochemically treated to form an insoluble film with good adhesion, which is composed of oxide, chromium, phosphide and some other compounds.This film can protect the substrate and metal materials from corrosive environment, but also improve the adhesion of the coating film.

Type of chemical transformation film for CNC machining parts

  • Aluminum and aluminum alloy chemical conversion coating (reference standard MIL-DTL-5541F)
TypesMaximum machining size(cm)Xavier
Type IContains hexavalent chromium
Type IIFree of hexavalent chromium
Class 1AFor sprayed or unsprayed products requiring optimum corrosion resistance
Class 3Used for antisepsis of products requiring low resistance
  • Chemical transformation coating of magnesium and magnesium alloy (AMS-M-3171)
Type Ichromate treatment 
Type IIdichromate treatment 
Type IIIElectrochemical anodic oxidation treatment 
Type IVChromic acid coating brush treatment
Type VFluorine anodic oxidation process with anti-corrosion treatment 
Type VIChromic acid passivation treatment

Critical items


Non standard requests

* We offer MIL-DTL-5541F and AMS-M-3171 chemical conversion coatings. Test methods: salt spray test, wet tape adhesion test, surface resistance test (only for level 3 coating). If you have special needs, please contact

**Porous conversion film can absorb organic dyes or inorganic dyes and dye them into various colors. If you have special needs, please contact

alotin golden

The Xavier`s Chemical conversion membrane technology capability

  • Substrate: aluminum and aluminum alloy, magnesium alloy
  • Reference Standard: MIL-DTL-5541F, AMS-M-3171
  • Test method: salt spray test, wet tape adhesion test, surface resistance test (for Class 3 coating only)
TypeAluminum alloy dichromate treatmentAluminum alloy environmental protection passivationMagnesium alloy treated with dichromateMagnesium alloy environmental protection passivation
Maximum machining size60*50*100230*45*11040*20*4040*20*40
Maximum weight per piece403001010
ColourLight yellow, golden yellowOff-white Golden yellow, rainbowOff-white 
EnvironmentNon environmental protectionenvironmental protectionNon environmental protectionenvironmental protection



We have high standards for Part surface treatment

We manufacture your custom parts according to strict manufacturing standards and ensure all parts and processes adhere to the Xavier Standard. A thorough verification of these requirements is included in our inspection report that we ship with every order.

  • Standard 1
    PO consistent

    We ensure that every part after machining is as specified in the PO as customer requirements.

  • Standard 2
    Quality check

    Prior to MP shipment to ensure that each part meets order specifications and Xavier standards.

  • Standard 3
    Require consistent

    Ensure conformance of parts and any required documentation prior to dispatching the order.

What They Say Our Clients About Us


The feedback they provide is invaluable. These reviews not only help us understand our customers' needs and expectations, but also guide improvements and optimization of products or services.

Alexa Loverty Alexa Loverty

Alexa Loverty

Chief designer

The sample has been received and it looks spectacular! In particular, the surface finishing is very nice and the finished piece feels wonderful in hand. We are very please with the result of your work. 

Alexa Loverty
Maxine Butler Maxine Butler

Maxine Butler


We did a quick build test of all versions and the looks, performance specs and functionality were good, and they worked just as well, as always. Delivery date no problem!

Maxine Butler
Dean Miler Dean Miler

Dean Miler


We placed our first order of 1500 stainless steel parts from Xavier and all parts of the sample were great, assembled correctly and we are very happy with the material and finish.

Dean Miler