(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 were used.
This low profile, IP66-rated wash down light is constructed of heavy-duty and corrosion resistant die cast aluminum with a
Chromate conversion coating, finished with an additional powder coating for extreme durability.
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.