Avaliação de indicadores de uso diverso como inibidores de corrosão

Química Nova

Sheila Pressentin Cardoso²  Fernanda Almeida Dos Reis²  Filipe Castelletti Massapust²  Jeremias De Freitas Costa²  Larissa Silveira Tebaldi²  Luiz Felipe Leal De Araújo²  Marcus Vinícius Augusto Da Silva²  Thiago Sousa De Oliveira²  José Antônio Da Cunha Ponciano Gomes¹  Eduardo Hollauer¹ 

[1] ,Centro Federal de Educação Tecnológica de Química de NilópolisNilópolis RJ

关键词: corrosion inhibitor;    acidification;    fluorescein;   

DOI  :  10.1590/S0100-40422005000500004

来源: SciELO

【 摘 要 】

Very often hydrochloric acid is employed in acidification operations aiming to dissolve the mineral matrix in petroleum wheel operations, which always require intense use of corrosion inhibitors. This work presents an evaluation of common indicators, phenolfthaleine, fluorescein, methylene blue, alizarine S and methyl orange, as corrosion inhibitors for carbon steel in HCl 15% w/v at temperatures of 26, 40 and 60 ºC. Fluorescein and methyl orange show excelent corrosion inhibition efficiencies at 26 ºC; however at 60 ºC only fluorescein shows good corrosion inhibition when employed with alcohol and/or formaldehyde. For the fluorescein 1% w/v + formaldehyde 0.6% w/v mixture we present polarization and impedance curves and adsorption isotherms.

【 授权许可】

CC BY-NC   
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