{"id":4126,"date":"2012-10-05T13:56:54","date_gmt":"2012-10-05T11:56:54","guid":{"rendered":"http:\/\/www.vivereingegneria.com\/blog\/?p=4126"},"modified":"2012-10-05T21:50:09","modified_gmt":"2012-10-05T19:50:09","slug":"magnetoelectropolishing-of-metallic-biomaterials-a-revolution-in-surface-finishing","status":"publish","type":"post","link":"https:\/\/www.vivereingegneria.com\/blog\/2012\/10\/magnetoelectropolishing-of-metallic-biomaterials-a-revolution-in-surface-finishing\/","title":{"rendered":"Magnetoelectropolishing of Metallic Biomaterials: A revolution in surface finishing."},"content":{"rendered":"

Il Prof. Tadeusz\u00a0Hryniewicz<\/strong> dell’Universita’ di Koszalin<\/strong>, Polonia, terra’ lunedi’ 8 ottobre 2012 alle ore 15.00 presso l’Aula Savagnone del\u00a0DIEETCAM un Seminario dal titolo: “Magnetoelectropolishing of Metallic Biomaterials: A revolution in surface finishing”.<\/p>\n

Electropolishing (EP) is an electrochemical anodic process with controlled dissolution of metal surface, performed under the conditions of pseudopassivity. Magnetoelectropolishing (MEP) is the process enhanced by involving a magnetic field to modify the surface properties.\u00a0Alteration in the metallic surface properties, in view of increasing biocompatibility and\/or haemocompatibility of biomaterials, is the main purpose of the MEP process. Thus the MEP is controlled by voltage U (V), or current I(A), (or current density i(A\/dm2) and the magnetic field intensity B(mT). One more variable included to MEP process (B) provides a better opportunity to obtain the metal surface of required properties.<\/em><\/p>\n

Though the MEP may be applied to any metal or alloy, the most significant and valuable effects are usualy obtained on biomaterials; they are the increased corrosion resistance, modified surface energy (increased wettability on request) and highly improved mechanical properties (nanohardness, Young\u2019s modulus, resistance to fracture under bending, etc.). In fact, a very compact and tight film formed on the surface after MEP affects multiple chemical, physical, and mechanical properties. Stainless<\/em> steels (<\/em>AISI 316LVM), CP Titanium Grade 2, and Ti alloys (binary, ternary and quaternary alloys), as well as other biomaterials (Co-Cr, Nb) are of a special attention.<\/em><\/p>\n

Our study methods include: surface roughness (Ra) and interferometry (Sa) measurements; Scanning Electron Spectroscopy SEM\/EDX studies; Contact Angle Measurement CAM; Auger AES and X-ray Photoelectron Spectroscopy XPS (the highly increased Cr\/Fe ratio, and\/or Ti\/Ni ratio); Secondary Ion Mass Spectroscopy SIMS and GDMS (a considerable dehydrogenation observed); corrosion studies (OCP, CP, EIS) with extremely high Pitting Resistance Equivalent Number PREN obtained; nanoindentation testing (significant changes observed); study of resistance to fracture (static and dynamic testing). One example of the recently obtained corrosion results to compare: Nitinol after MEP with Eb equaling 1130 mV (literature data), and AISI 316L SS after MEP with Eb reaching 1100 up to 1400 mV (our own studies).<\/em><\/p>\n

*E-mail: Tadeusz.Hryniewicz@tu.koszalin.pl<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Il Prof. Tadeusz\u00a0Hryniewicz dell’Universita’ di Koszalin, Polonia, terra’ lunedi’ 8 ottobre 2012 alle ore 15.00 presso l’Aula Savagnone del\u00a0DIEETCAM un Seminario dal titolo: “Magnetoelectropolishing of Metallic Biomaterials: A revolution in surface finishing”. Electropolishing (EP) is an electrochemical anodic process with controlled dissolution of metal surface, performed under the conditions of pseudopassivity. Magnetoelectropolishing (MEP) is the […]<\/p>\n","protected":false},"author":3,"featured_media":16315,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","footnotes":""},"categories":[57],"tags":[1145,1123,1128,1137,1140,1147,1134,1131,1150,1146,1144,1135,1132,1129,1151,1139,1149,1148,1133,1138,1130],"class_list":{"0":"post-4126","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-seminari","8":"tag-biocompatibility","9":"tag-biomaterials","10":"tag-contact-angle-measurement","11":"tag-corrosion-resistance","12":"tag-current-density","13":"tag-dm2","14":"tag-electron-spectroscopy","15":"tag-magnetic-field-intensity","16":"tag-mep","17":"tag-metal-surface","18":"tag-metallic-surface","19":"tag-quaternary-alloys","20":"tag-secondary-ion-mass","21":"tag-secondary-ion-mass-spectroscopy","22":"tag-spectros","23":"tag-stainless-steels","24":"tag-surface-energy","25":"tag-surface-properties","26":"tag-surface-roughness-ra","27":"tag-titanium-grade-2","28":"tag-x-ray-photoelectron-spectroscopy"},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.vivereingegneria.com\/blog\/wp-json\/wp\/v2\/posts\/4126","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vivereingegneria.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vivereingegneria.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vivereingegneria.com\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vivereingegneria.com\/blog\/wp-json\/wp\/v2\/comments?post=4126"}],"version-history":[{"count":11,"href":"https:\/\/www.vivereingegneria.com\/blog\/wp-json\/wp\/v2\/posts\/4126\/revisions"}],"predecessor-version":[{"id":4138,"href":"https:\/\/www.vivereingegneria.com\/blog\/wp-json\/wp\/v2\/posts\/4126\/revisions\/4138"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.vivereingegneria.com\/blog\/wp-json\/wp\/v2\/media\/16315"}],"wp:attachment":[{"href":"https:\/\/www.vivereingegneria.com\/blog\/wp-json\/wp\/v2\/media?parent=4126"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vivereingegneria.com\/blog\/wp-json\/wp\/v2\/categories?post=4126"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vivereingegneria.com\/blog\/wp-json\/wp\/v2\/tags?post=4126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}