Presentation on theme: "A Comparative Study of the 0.05Al Process October 2, 2012."— Presentation transcript:
A Comparative Study of the 0.05Al Process October 2, 2012
Background Al for broadband Si reactivity control H. Guttman and P. Niessen, 1975 M. Pierre, 1975 Commercialization failure of Polygalva, 1979 Al-compatible flux (G-flux) US Patent US 7,811,389 B2, 2010 Commercial production of 12Al coating 2
Parts Steel Parts (2982 kg in total) 0.04% - 0.28% Effective Si 3
Baths, Centrifuge and Products Baths (2400 kg each) Bath A: 0.039%Al Bath B: 0.051%Al Bath H: 0.005%Al 4
Drainage (Part k) 15 The amount of accumulation at the bottom of Part k: BathW (g)W (lb) H3.90.0086 A3.00.0066 B2.90.0064 Students test indicated that there were significant differences between Baths H and AB, whereas there was no significant difference between Baths A and B.
Summary New Process (0.04-0.05%Al) vs. HDG Al-compatible flux (G-Flux) Brighter, shinier and thinner coating Improved coating adhesion Slightly better drainage Slightly more dross but same amount of ash Less visible oxide skin More localized white rust Slightly shorter kettle life 17