(28.) Long, ZL, Zhou, YC, Xiao, L, "Characterization of Black Chromate Conversion Coating
on the Electrode-posited Zinc--Iron Alloy." Appl.
exhibited a new highly corrosion-resistant trivalent chromate conversion coating
for aluminum that meets or exceeds MIL C 5541 requirements.
The US DoD (Defense Dept) continues its campaign to ban hexavalent chromium (electroplated and as chromate conversion coating
), and several talks centred on this theme.
(50.) Ilevbare, GO, Scully, JR, Yuan, J, Kelly, RG, "Inhibition of Pitting Corrosion on Aluminum Alloy 2024 T3: Effect of Soluble Chromate Additions vs Chromate Conversion Coating
." Corrosion, 56 227-242 (2000)
Source 2, on the other hand, passivated to a constant, lower corrosion rate indicated by the constant corrosion current i above +0.2 V versus standard calomel electrode (SCE) for the chromate conversion coating
and +0.7 V for a cerate conversion coating.
The corrosion numbers at 1000 hr were also close to values reported by Mol where a similar pretreatment, deoxidizer, and chromate conversion coating
These layers consist of a chromate conversion coating
to prevent corrosion and enhance adhesion, an epoxy primer containing chromated pigments to provide additional corrosion protection and enhanced chemical resistance, and a polyurethane topcoat that provides weatherability and fluid resistance.
(1.) Zaki, N, "Chromate Conversion Coating
for Zinc." Met.
Persson, "The role of chromate conversion coating
in the filiform corrosion of coated aluminum alloys," Journal of the Electrochemical Society, vol.