Aerosol fluxing in electro arc metallization

Abstract

Abstract. The main structural and technological factors of electric arc metallizers, which significantly affect the quality of their operation, are considered. The results of experimental studies on the adhesion strength, porosity, microhardness and comparative wear resistance of coatings obtained by electroarc metallization are presented. Optimal modes of coating with electroarc metallization are determined. It is established that the use of aerosol fluxing during electric arc metallization provides an increase in adhesion-cohesive strength by 25 ... 30%, an increase in microhardness to 40%, a decrease in porosity by 20 ... 25%. IntroductionIn the world practice of restoring the details of machinery and corrosion protection of aluminum and zinc pipes, equipment and metal structures, electric arc metallization (EM) has become very popular, as one of the most technologically productive, high-quality and universal methods of metal coating. However, along with clearly positive sides, EM has certain drawbacks. This perennial problem is the speed and oxidation of dispersed metal in a heterophase stream. Without overcoming these EM problems, it is impossible to further improve the physical and mechanical properties of metal coatings. Despite the extensive volume of studies carried out to modernize EM over the historical period of its use (over 100 years), these problems remain unresolved.

Reasonability of Aerosol Fluxing Use at Thermal Spraying

“…Оно будет способствовать удалению из расплавленного металла растворенного в нем кислорода, а также легирования ЭМ-покрытия. АФ основано на том, что в факел диспергированного расплавленного электрической дугой металла вводится вместе со сжатым воздухом аэрозоль, представляющий собой раствор в дистиллированной воде химических материалов, которые при растворении в воде прошли этап электролитической диссоциации [6][7][8][9].…”