The new products are: Corroless VOC Primer--a High Performance 2K Waterbased Epoxy Primer, PercoHyd 433--a 2K WB Structure topcoat, and PercoTop CS306--a Chrome VI-free 2K wash primer
Comprising the basic system are PPG DESOPRIME 7530 pretreatment wash primer
, PPG Desoprime 7065 primer, PPG DESOFILL HS 8620 sanding surfacer, PPG DESOTHANE HS 8800 topcoat, and PPG Desothane HD 9008 clearcoat.
"This DIM system eliminates the need to use any type of metal pretreatment, such as Alodine, Solgel, or Wash primer
technologies; the primer is applied directly to the clean Scotch-Brited substrate and provides the necessary adhesion and corrosion resistance to meet the stringent specification requirements," notes Fusco.
Otherwise, immediately coat all bare metal surfaces with a coat of wash primer
. The wash primer
protects the surface and will help the WD primer bond to it.
is excellent for galvanized and aluminum surfaces to promote adhesion of top coats.
Sherwin-Williams Aerospace Coatings donated products--including Chrome Hazard Free Urethane Primer and Wash Primer
--to create and protect the Red Knight color scheme.
In addition, there should be some kind of wash primer
, pretreatment, or conversion coating to enhance wetting and provide a uniform surface for better adhesion.
Built in 1976, it was grit blasted and shop coated with one of zinc chromate polyvinylbutyral wash primer
plus three coats of zinc phosphate epoxy primer (4 mils).
(1) Twelve years later, it was found that a wash primer
, based solely on silanes could provide similar benefits.
A direct to metal system eliminates the need to use any kind of metal pre-treatment such as Alodine, Solgel or Wash primer
PPG has also launched Desoprime CF/7530 chrome free wash primer
. This is the first completely chrome free wash primer
in the industry, and is well-suited for aftermarket and OEM applications in terms of improved efficiency.