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

Bioactive Materials 2022年第5期7卷 166-180页

作者： Leticia Marin de Andrade Carlo Paternoster Pascale Chevallier Sofia Gambaro Paolo Mengucci Diego Mantovani Laboratory for Biomaterials and Bioengineering Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in SurgeryDepartment of Min-Met-Materials EngineeringResearch Center of CHU de QuebecDivision of Regenerative MedicineLaval UniversityQuebec CityQCG1V 0A6Canada National Research Council Institute of Condensed Matter Chemistry and Technologies for Energy CNR-ICMATEGenoa16149Italy Polytechnic University of Marche Ancona60121Italy

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

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A new acid pickling process for copper alloys

引用

Journal of University of Science and Technology Beijing 2002年第2期9卷 127-129页

作者： Xing Zou, Bo Song, Keming Fang, and Danniang Xu Metallurgy School, University of Science and Technology Beijing, Beijing 100083, China Metall. Sch. Univ. of Sci. and Technol. Beijing Beijing 100083 China

The cleaning process of removing oxides on the surface of copper alloy sheetswas investigated systematically. Through optimizing, a perfect process was selected that is fit forremoving oxides on the surface. By acid pickling, all kinds of copper oxides are removedcompletely, furthermore, no poisonous gases are given out and a smooth and clean surface of copperalloys is obtained. At present, the process is applied successfully in the copper-processingindustry.

关键词： copper alloy surface processing oxides of copper acid pickling

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