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3M Aerospace AC-131 CB Surface Pre-Treatment

3M Aerospace AC-131 CB Surface Pre-Treatment

Start your conversion coating task right with 3M Aerospace Sealant AC-131 CB Surface Pre-Treatment from SkyGeek. Optimize metal and mixed surfaces with ultimate adhesive preparedness and make them ready to receive an organic coating. Free of chromate (a hazardous material) and eliminating the need for surface brightening or deoxidizing, this two-part kit is safe and saves labor.

Approvals, References and Specifications
  • BSMS-25-002 (Titanium) - Qualified (four-part clear ONLY)
  • BAC 5663 (Aluminum)
  • BAC 5665 (Titanium, CRES, Nickel)
  • BSPS 07-002 (Titanium)
  • D6-1816 (Aircraft Painting)
  • AAC 1.2 (Aluminum)
Use Instructions
Surface Preparation

AC-131 may be applied after cleaning to a "water-break free" surface. Alkaline cleaning will usually provide a "water-break free" surface. Chemical etching and deoxidizing is generally not required. Manual deoxidation can be accomplished by either Scotch Brite pad abrasion or sanding with #180 grit or finer Aluminum Oxide sandpaper.

Application Process

  • Strip aircraft
  • Alkaline clean to water-based-free surface
  • Apply AC-131 Conversion Coating
  • Prime and paint
  • NOTE: It may be necessary to deoxidize prior to applying AC-131 if a water-break-free surface is not achieved by the cleaning process.

    Application rate is approximately 1 quart of AC-131 for approximately 200 ft-squared of surface to be coated.

    Spray Application

    AC-131 coating solution can be sprayed onto the part surface using a variety of methods including HVLP guns, hand pump sprayers, etc. The solution is applied so as to completely wet the part surface with a mist. Excess solution may run off the part. Larger surface areas may require coating by sections.

    Brush Application

    Apply fresh AC-131 by brushing with a clean natural bristle brush or swabbing with a clean wiper, cheesecloth or gauze. Do not scrub with a brush or application. Apply solution to achieve complete coverage of surface to be treated. Brushes or wipers should not leave streaks on the surface.

    Allow coated part to drain for 3 to 10 minutes. If there is any surplus AC-131 solution that has pooled or collected in crevices, pockets, or other collection areas, including drip edges or fastener holes, use filtered compressed air to blow off excess solution. Do not splatter this excess solution onto adjoining part surfaces. Alternatively a cloth pre-wetted with AC-131 may be used to gently blot, not rub, the surface of pooled solution. Do not blow dry areas of the part that are able to freely drain.

    Dry/Cure of AC-131

    Dry the solution-coated parts under ambient conditions for a minimum of 60 minutes. Minimize contact with the part while drying. Exact drying time will vary depending upon part configuration of the part and ambient conditions. Alternately, after drying at ambient temperature for a minimum of 30 minutes parts may be heated to 140°F maximum for an additional 30 minutes minimum to facilitate drying. After drying, coated surfaces should be protected from contamination prior to applying the epoxy-based or polyurethane-based organic coating.

    How It Works

    A Sol-Gel preparation, AC-131 promotes enhanced adhesion as a result of the chemical interaction at the interfaces between the metal and the AC-131 and the AC-131 and the primer.

    Financial Benefits

    Time savings: Reduction in process flow time comparing traditional conversion coatings methods yields a minimum of a 35% reduction in labor-time.

    Enables Lean Manufacturing and Work Cell Manufacturing concepts, reducing cycle times.

    Hazardous materials: Elimination of hazardous chromate materials. Hazardous rinse water and waste water containment systems area eliminated.

    Minimal waste water associated with application of AC-131 as there is no rinsing.

    Environmental Benefits

  • Non-chromated
  • Water-based solution
  • No rinsing, dry in place
  • No fluorides
  • No strong oxidizers
  • No strong mineral acids
  • Health & Safety Precautions

    After using this product, to prevent ingestion, always wash your hands before eating or smoking. Read the Material Safety Data Sheet for more information.

    Storage

    The shelf life of AC-131 2-part configuration is 12 months from the date of manufacture when stored in the original unopened containers between 40 degrees Fahrenheit and 100°F.

    Features
    • Non-chromate Sol-Gel two-part solution kit for metal substrate pre-treatment
    • Optimized bond between metal and organic coatings
    • Durable performance on aluminum, nickel and titanium alloys
    • No scrubbing or rinsing
    • Common surface preparation on mixed metal and non-metal substrates minimizes masking
    • Supports a variety of application techniques: brush, spray and dip
    • Accelerated process flow time due to a 35 percent reduction in labor time
    • Aluminum surface treatment is available in easy-access pint containers
    • Multiple kit size options: pints, quarts, gallons, pails and drums
    • Rate of application: approximately 1 quart of AC-131 for approximately 200 square feet of surface for coating
    Specifications
    Qualified Specifications

  • BSMS-25-002 (Titanium) - Qualified (4-part clear ONLY)
  • BAC 5663 (Aluminum)
  • BAC 5665 (Titanium, CRES, Nickel)
  • BSPS 07-002 (Titanium)
  • D6-1816 (Aircraft Painting)
  • AAC 1.2 (Aluminum)
  • Testing

    Coatings systems using AC-131 have been tested successfully at the OEM and Depot level.

    The following testing has been performed with passing results:

  • Condensing humidity
  • Rain erosion
  • 3000 hour slat spray
  • Filiform corrosion
  • Wet and dry scribe adhesion
  • Paint softening
  • Acrylic crazing
  • Hydrogen embrittlement
  • Tests were performed using coatings systems (Primer & Topcoat).

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    Part Number
    051141-57833
    Size
    50 mL Kit
    Spec
    BMS10-128A, Type I, Class A, Grade A
    Price
    $53.76
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    Certification
    Material Safety Data Sheet:
    MSDS1
    Country of Origin: United States
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    Part Number
    051141-57831
    Size
    100 mL Kit
    Spec
    BMS10-128A, Type I, Class A, Grade A
    Price
    $47.70(Kit)
    (Sold in increments of 10)

    Hover for Qty Pricing
    Qty
    Certification
    Material Safety Data Sheet:
    MSDS1
    Country of Origin: United States
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    Part Number
    051141-57835
    Size
    Pint Kit
    Spec
    BMS10-128A, Type I, Class A, Grade A
    Price
    $114.88
    Hover for Qty Pricing
    Qty
    Certification
    Material Safety Data Sheet:
    MSDS1
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    Part Number
    051141-57834
    Size
    N/A
    Spec
    N/A
    Price
    $380.84(Kit)
    (Sold in increments of 2)

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    Certification
    Same Day Ship
    Material Safety Data Sheet:
    MSDS1
    Country of Origin: United States
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