Metalurgia & Materiais Estudo das características antiincrustantes de materiais

Chemical coatings of Ni-P have been observed invarious applications, such as, tools, molds and matrices,mainly to prevent wear and corrosion. In this presentwork, Ni-P coatings with 8 and 10%P were depositedon steel ABNT 1020 and heat-treated at temperaturesbetween 300oC and 650oC for 1h. The microstructures,nickel and phosphates have been examined using ascanning electronic microscope (SEM). Analyses ofDifferential Scanning Calorimetry (DSC) has beencarried out to detect reactions and transformations ofthe phases. The results of assay scratch revealed avariation of the adhesion of these coatings in functionof the heat treatment temperature, as well as of thehardness to the scratch that reached a maximum valueto 400oC. Keywords : Ni-P, adhesion, hardness to the scratch. Metalurgia & Materiais Avaliacao da adesao e da dureza ao riscopelo ensaio de riscamento derecobrimentos quimicos de Ni-P Wagner Sade Engenheiro Metalurgista/MSc-REDEMAT. E-mail: wagnersade@hotmail.com Everton G. de Neiva

Metalurgia & Materiais Avaliação da adesão e da dureza ao risco pelo ensaio de riscamento de recobrimentos químicos de Ni-P

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Metalurgia & Materiais Estudo das características antiincrustantes de materiais

Metalurgia & Materiais Avaliação da adesão e da dureza ao risco pelo ensaio de riscamento de recobrimentos químicos de Ni-P