{"title":"A Rapid Electrochemical Test for Porosity in Electroless Nickel Coatings on Carbon Steel Substrates","authors":"A. Nahlé, C. Kerr, B. D. Barker, F. C. Wals","doi":"10.1080/00202967.1998.11871188","DOIUrl":null,"url":null,"abstract":"SummaryA rapid electrochemical test for the determination of porosity in electroless nickel coatings on carbon steel is described. The technique is based on the charge under the anodic peaks during the reverse cathodic scan of the cyclic voltammograms for various immersion times (ranging from 0 to 2 hours) of nickel-coated steel samples (0 to 24 μm thickness) in a solution consisting of 150 mL of 0.1 M H2SO4 and 10 mL of 0.1 M K4Fe(CN)6 at 298 K. It was found that approximately 44% of the steel area remained uncovered with nickel after 2 minutes deposition time (0.4 μn thick). This percentage of uncovered area with nickel decreased to approximately 3 % when the steel samples had been immersed for 14 minutes (2.8 μm thick); essentially complete coverage occurred after an immersion time greater than 30 minutes (6 μm thick).","PeriodicalId":23268,"journal":{"name":"Transactions of The Institute of Metal Finishing","volume":"76 1","pages":"29-34"},"PeriodicalIF":1.2000,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00202967.1998.11871188","citationCount":"14","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions of The Institute of Metal Finishing","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1080/00202967.1998.11871188","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}
引用次数: 14
Abstract
SummaryA rapid electrochemical test for the determination of porosity in electroless nickel coatings on carbon steel is described. The technique is based on the charge under the anodic peaks during the reverse cathodic scan of the cyclic voltammograms for various immersion times (ranging from 0 to 2 hours) of nickel-coated steel samples (0 to 24 μm thickness) in a solution consisting of 150 mL of 0.1 M H2SO4 and 10 mL of 0.1 M K4Fe(CN)6 at 298 K. It was found that approximately 44% of the steel area remained uncovered with nickel after 2 minutes deposition time (0.4 μn thick). This percentage of uncovered area with nickel decreased to approximately 3 % when the steel samples had been immersed for 14 minutes (2.8 μm thick); essentially complete coverage occurred after an immersion time greater than 30 minutes (6 μm thick).
介绍了一种快速测定碳钢化学镀镍层孔隙率的电化学试验方法。该技术是基于不同浸泡时间(0至24 μm厚度)的镀镍钢样品(0至2小时)在由150 mL 0.1 M H2SO4和10 mL 0.1 M K4Fe(CN)6组成的溶液中，在298 K下循环伏安图的反向阴极扫描中阳极峰下的电荷。结果表明，沉积时间为2 min (0.4 μn厚)后，约44%的钢区未被镍覆盖。当钢样品(2.8 μm厚)浸泡14分钟后，含镍未覆盖面积的百分比降至约3%;浸渍时间大于30分钟(6 μm厚)后基本完全覆盖。
期刊介绍：
Transactions of the Institute of Metal Finishing provides international peer-reviewed coverage of all aspects of surface finishing and surface engineering, from fundamental research to in-service applications. The coverage is principally concerned with the application of surface engineering and coating technologies to enhance the properties of engineering components and assemblies. These techniques include electroplating and electroless plating and their pre- and post-treatments, thus embracing all cleaning pickling and chemical conversion processes, and also complementary processes such as anodising. Increasingly, other processes are becoming important particularly regarding surface profile, texture, opacity, contact integrity, etc.
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