Autodeposition is an immersion, direct-to-metal coating process that forms a paint film on metal surfaces by a chemical reaction between an aqueous paint dispersion and the base metal. The autodeposition process consists of cleaning, rinsing, organic coating deposition, and a sealing rinse. Conventional pretreatment/primer systems require full thermal cure prior to topcoat application because of volatiles that must be lost during cure. The latest autodeposition chemistry consists of an epoxy-acrylic hybrid mini-emulsion. The chemical combination of a flexible, high molecular weight acrylic with a hard, tough epoxy in a semi-interpenetrating network provides a very low VOC (≤0.03 lb/gal) coating. Upon dehydration ~100°C, the autodeposited coating provides a dry-to-handle, tack-free film with physical integrity. A powder topcoat or sealer/adhesive can be applied to the dehydrated autodeposited coating. Finally, both the primer and topcoat or primer and sealer/-adhesive are chemically "Co-Cured" in a single oven.This paper describes the autodeposition chemistry, process sequence, and deposition mechanism. It illustrates the innovative modeling and design of the latest autodeposition chemistry that led to the implementation of the "Co-Cure" process. Further, it describes the "Co-Cure" process, showing its performance, simplicity advantages, and demonstrates its contribution to a sustainable, lean, and modular paint shop.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Co-Cure Process: Autodeposition Primer and Powder Topcoat


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2010 World Congress & Exhibition ; 2010



    Publication date :

    2010-04-12




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Autodeposition update

    Holyk,N.M. / Roberto,O.E. / Jones,T.C. et al. | Automotive engineering | 1989


    Streamlining autodeposition

    Woock, Kevin | Tema Archive | 2008


    Autodeposition Update

    Holyk, Nestor M. / Roberto, Oscar E. / Jones, Thomas C. | SAE Technical Papers | 1989


    Autodeposition - A New Process for Controlling Corrosion

    Leister,H.M. / Amchem Products,US | Automotive engineering | 1978


    Autodeposition Coatings: New Commercial Applications

    Abu-Shanab, Omar L. / Fristad, William E. | SAE Technical Papers | 2008