D-shield is applied to galvanized, iridescent passivated or silver materials in order to preserve the deposit itself from corrosion. The latter feature is due to the presence of the D-Shield topcoat, an organic coating within which submicron particles of organic polymers and polysilicides are incorporated . Mechanical stresses, such as rubbing, slight scuffing, and impact, do not cause premature white corrosion phenomena. Salt spray corrosion resistance conducted according to ASTM B 117 of parts coated with 12 ums and heat treated at 120°C for 1 h verified the absence of white corrosion for 350 h and the absence of red rust for 450 h. In addition, repeated thermal tests at 120°C/ 1 hour do not produce changes in protective qualities.