Surface processing for iron-based degradable alloys:A preliminary study on the importance of acid pickling  

作　　者：Leticia Marin de Andrade Carlo Paternoster Pascale Chevallier Sofia Gambaro Paolo Mengucci Diego Mantovani 

机构地区：[1]Laboratory for Biomaterials and Bioengineering,Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery,Department of Min-Met-Materials Engineering,Research Center of CHU de Quebec,Division of Regenerative Medicine,Laval University,Quebec City,QC,G1V 0A6,Canada [2]National Research Council,Institute of Condensed Matter Chemistry and Technologies for Energy CNR-ICMATE,Genoa,16149,Italy [3]Polytechnic University of Marche,Ancona,60121,Italy

出　　处：《Bioactive Materials》2022年第5期166-180,共15页生物活性材料（英文）

摘　　要：The formation of a heterogeneous oxidized layer,also called scale,on metallic surfaces is widely recognized as a rapid manufacturing event for metals and their alloys.Partial or total removal of the scale represents a mandatory integrated step for the industrial fabrication processes of medical devices.For biodegradable metals,acid pickling has already been reported as a preliminary surface preparation given further processes,such as electropolishing.Unfortunately,biodegradable medical prototypes presented discrepancies concerning acid pickling studies based on samples with less complex geometry(e.g.,non-uniform scale removal and rougher surface).Indeed,this translational knowledge lacks a detailed investigation on this process,deep characterization of treated surfaces properties,as well as a comprehensive discussion of the involved mechanisms.In this study,the effects of different acidic media(HCl,HNO_(3),H_(3)PO_(4),CH_(3)COOH,H_(2)SO_(4) and HF),maintained at different temperatures(21 and 60℃)for various exposition time(15-240 s),on the chemical composition and surface properties of a Fe-13Mn-1.2C biodegradable alloy were investigated.Changes in mass loss,morphology and wettability evidenced the combined effect of temperature and time for all conditions.Pickling in HCl and HF solutions favor mass loss(0.03-0.1 g/cm^(2))and effectively remove the initial scale.

关 键 词：Biodegradable metals Iron-based alloys Acid pickling Surface finishing Pre-treatment 

分 类 号：TG13[一般工业技术—材料科学与工程]