Failure Evaluation of Aluminum Alloy in 2 M HydrochloricAcid in the Presence of Cola acuminata

Environment research journal Pub Date : 2011-04-01 DOI:10.3923/ERJ.2011.163.169

O. Ajayi, O. Omotosho, K. O. Ajanaku, Babatunde O. Olawore

{"title":"Failure Evaluation of Aluminum Alloy in 2 M HydrochloricAcid in the Presence of Cola acuminata","authors":"O. Ajayi, O. Omotosho, K. O. Ajanaku, Babatunde O. Olawore","doi":"10.3923/ERJ.2011.163.169","DOIUrl":null,"url":null,"abstract":"Hydrochloric acid induced damage of alwninwn alloy in the presence of Cola acuminata extract was \ninvestigated using gasometric technique. Alwninwn alloy coupons of dimension 4 em by 1 em were immersed \nin test solutions of free acid and also those containing extract concentrations of 2-5 cm3 at ambient temperature \nfor 30 min. The volwnes of hydrogen gas evolved as a result of the reaction rate were recorded and analyzed. \nThe outcome revealed that maximwn inhibitor efficiency which corresponds to the lowest corrosion rate was \nobtained at optimwn inhibitor concentration with reduction in the corrosion rate observed to follow in order \nof increasing extract concentration. The mechanism of interaction between the phytochemicals in the plant \nextract and ahnninlllll alloy swface was best described by the Fnnnkin isotherm with 6 and 14 min becoming the \nbest exposure time for the phytochemicals in extract concentrations of 3-5 cm3 to suitably adsorb to metal alloy \nsurface. Statistically modeling the corrosion rate yielded a significant relationship suitable for estimating \ncorrosion rate values once concentration of the extract is known. In addition, the superficial analysis revealed \nthat crack growth rate slowed do\\Vll and irregular intermetallic phases were more mriform as extract \nconcentration increased.","PeriodicalId":72927,"journal":{"name":"Environment research journal","volume":"10 1","pages":"163-169"},"PeriodicalIF":0.0000,"publicationDate":"2011-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"13","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environment research journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3923/ERJ.2011.163.169","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 13

Abstract

Hydrochloric acid induced damage of alwninwn alloy in the presence of Cola acuminata extract was investigated using gasometric technique. Alwninwn alloy coupons of dimension 4 em by 1 em were immersed in test solutions of free acid and also those containing extract concentrations of 2-5 cm3 at ambient temperature for 30 min. The volwnes of hydrogen gas evolved as a result of the reaction rate were recorded and analyzed. The outcome revealed that maximwn inhibitor efficiency which corresponds to the lowest corrosion rate was obtained at optimwn inhibitor concentration with reduction in the corrosion rate observed to follow in order of increasing extract concentration. The mechanism of interaction between the phytochemicals in the plant extract and ahnninlllll alloy swface was best described by the Fnnnkin isotherm with 6 and 14 min becoming the best exposure time for the phytochemicals in extract concentrations of 3-5 cm3 to suitably adsorb to metal alloy surface. Statistically modeling the corrosion rate yielded a significant relationship suitable for estimating corrosion rate values once concentration of the extract is known. In addition, the superficial analysis revealed that crack growth rate slowed do\Vll and irregular intermetallic phases were more mriform as extract concentration increased.

查看原文本刊更多论文

铝合金在2 M盐酸中存在可乐的失效评价

采用气相色谱法研究了可乐提取物在盐酸作用下对铝合金的损伤。将尺寸为4 em × 1 em的Alwninwn合金试样在室温下分别浸入游离酸和含有2-5 cm3提取物的测试溶液中30 min，记录并分析反应速率产生的氢气量。结果表明，在最佳缓蚀剂浓度下，缓蚀剂效率最高，腐蚀速率最低;缓蚀剂浓度越高，腐蚀速率越低。fnnkin等温线可以很好地描述植物提取物中植物化学物质与金属合金表面的相互作用机制，3 ~ 5 cm3浓度的植物提取物中植物化学物质的最佳吸附时间为6 min和14 min。一旦萃取物的浓度已知，对腐蚀速率的统计建模产生了一个重要的关系，适合于估计腐蚀速率值。此外，表面分析表明，随着萃取物浓度的增加，裂纹扩展速度减慢，不规则的金属间相更加不规则。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Environment research journal

自引率

0.00%

发文量