Practical adhesion measurements of protective coatings on bronze by three-point bending test
作者： Maëlenn Aufray , Claudie Josse , Andrea Balbo , Cecilia Monticelli , Erika Švara Fabjan
DOI: 10.1007/S11998-019-00230-5
关键词: Materials science 、 Coating 、 Accelerated aging 、 Composite material 、 Alloy 、 Corrosion 、 Three point flexural test 、 Silane 、 Adhesive 、 Bronze
摘要: When attempting to sufficiently protect outdoor bronze monuments from corrosion, searches for an effective solution are usually based on coating applications which have a high anticorrosive efficiency. In order correctly assess the level of protection provided by such coatings, adherence (practical adhesion) measurements need be performed proper evaluation deterioration systems with aging. Although coupled study aging would great interest, very few studies available. this work, methodological approach is proposed coatings applied metallic cultural heritage monuments of, use three-point bending test. Adherence characterization different protective has been both bare and traditionally black-patinated coupons (Cu–Sn alloy 5.9 wt% Sn), were used as basic model substrates. The investigated Incralac®, silane, sol–gel oxysilane, silane-modified polymethacrylate (an adhesion promoter fluoropolymer). results obtained before after accelerated in concentrated acid rain made it possible more easily differentiate between various levels systems. Coupled measurements, systematic optical SEM observation failure morphologies also presented. case coated alloy, adhesive failures mainly observed. silane (PropS-SH) showed best adherence. patinated test specimens, only cohesive occurred. directly related cohesion black patina rather than that coating. It was observed reduces
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