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Evaluation of Propargyl Alcohol as a Corrosion Inhibitor for Duplex Stainless Steel in Hydrochloric Acid

Journal of Civil Engineering and Architecture 2020年第7期14卷 378-384页

作者： Fernando Benedicto Mainier Virgílio P.dos Reis edilson ferreira de barros Brígida B.de Almeida Escola de Engenharia Universidade Federal FluminenseNiteróiRio de Janeiro24020-140Brazil

ASTM A182 F51 duplex stainless steel with a 50:50 ratio of austenite to ferrite microstructure is a material used in mechanical *** uses include the manufacturing of equipment and components subject to acidification or acid stimulation for oil and gas *** acid stimulation or acidification,hydrochloric acid(HCl)solution with concentrations ranging from 5%to 28%(by volume)is injected into the limestone(CaCO3)and dolomite(CaCO3·MgCO3)reservoir rock to restore permeability and consequently increase oil well ***,it is important to use a corrosion inhibitor,such as propargyl alcohol,to prevent or inhibit the aggressive attack of HCl on duplex stainless *** present study evaluates the corrosion resistance of ASTM A182 F51 stainless steel using gravimetric(mass loss)and electrochemical(polarization)*** were completed with and without the addition of 500 and 1,000 mg/L propargyl alcohol in HCl solutions with concentrations of 10%and 15%(by volume)at temperatures of 25,40 and 55°*** good protection by propargyl alcohol of duplex steel immersed in HCl is observed.

关键词： Duplex stainless steel corrosion inhibitor propargyl alcohol hydrochloric acid acid stimulation

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Comparison of Three Experimental Models for Rat Osteoarthritis Induction

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Journal of Biosciences and Medicines 2016年第12期4卷 62-69页

作者： Henrique Ribeiro Rodrigues-Neto edilson ferreira Andrade-Junior denilson Jose Silva Feitosa-Junior André Lopes Valente Thiago Cesar Xavier Bianca Caroline do Nascimento Alho Renan Kleber Costa Teixeira Fabio Vidal Moriya Rui Sérgio Monteiro de barros department of Orthopaedics and Traumatology Porto Dias Hospital Bel&eacute m Brazil Experimental Surgery Laboratory Par&aacute State University Bel&eacute m Brazil

Background: Osteoarthritis is a slowly progressive and debilitating disease with high prevalence in adult population. Knee is one of the joints most affected by this disorder. There are several models for animals’ osteoarthritis induction, however it is not identified any paper that compares these techniques. The present study was aimed to define the most appropriate model for rats osteoarthritis induction. Material and Methods: 40 Wistar rats were distributed into 4 groups of 10 animals each: normality group (NG);meniscectomy group (MG);quinolone group (QG) and iodoacetate group (IG). Radiographic images of the rat’s knees were analyzed as well as the amount of chondrocytes in the epiphyseal and articular cartilage. Results: In the radiographic analysis, there was a low correlation between the raters. Regarding the amount of chondrocytes in the epiphyseal cartilage, it was noticed that the IG and QG groups had fewer chondrocytes than NG, in contrast to MG that reported similar results to normality (p > 0.05). There was no significant difference between IG and QG groups (p > 0.05). Regarding the amount of chondrocytes in articular cartilage, it was noticed that the IG group showed fewer chondrocytes than NG (p 0.05). There was no significant difference between QG and MG groups (p > 0.05). Conclusion: Intraarticular injection of iodoacetate in rats is the model with greatest effect on reduction of chondrocytes amount.

关键词： Osteoarthritis Knee Joint Experimental Arthritis Animal Disease Models Rats

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