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Use of Zn-Bi-Ni Alloy to Improve Zinc Coating Appearance and Decrease Zinc Consumption in Hot-Dip Galvanizing
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Characterization of passivation products on galvanized steel reinforcements in concrete
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Contemporary use of Ni and Bi in hot-dip galvanizing
No full textFive series of commercially hot-rolled mild steels, with different silicon and phosphorus content, were tested in four industrial hot-dip galvanizing plants with different bath compositions: two innovative alloys containing low percentages of Ni and Bi (Ni ≈ 0.04% and Bi ≈ 0.1%), one alloy containing Ni (≈ 0.05%) and a traditional Zn-Pb (Pb ≈ 1.1%) alloy. The coatings obtained were studied by chemical analysis, thickness measurements and by metallographic technique observation. The Zn-Ni-Bi alloy gave very interesting results with all the steels tested. Indeed, the steel reactivity and the coating thickness in the two innovative baths were always lower than those obtained by the traditional Zn-Pb bath and similar to those obtained with the bath containing Ni (Technigalva). These results have been attributed to a synergistic effect of Ni and Bi on the reactivity control of the reactive steels; in fact, even a low Ni content gives the same or even better results than the classical Zn-Ni bath, except for high phosphorus steels. Furthermore, Bi is not detrimental to human health and the environment and can be considered a very good alternative to Pb to improve bath fluidity
Zincatura a caldo: verifica dell’efficacia di leghe innovative Zn-Ni-Bi in campo industriale
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