English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The objective of this study is to compare the corrosion resistance of the base metal (MB) and weld region (RCS)\udof a X80 pipeline in three types of aqueous solution of acetic acid (CH3COOH) 0,5% by weight: naturally aerated, non-aerated and non-aerated with H2S. Linear polarization is employed for it determinates Polarization Resistance (Rp) which allows comparing the corrosion resistance of steel in different conditions. The results show that Rp practically does not change with the immersion time (until 8 hours), for both regions. The two regions have higher Rp in non-aerated aqueous solution, intermediate Rp in non-aerated with H2S and lower Rp in naturally aerated; this is due the effect of oxygen in cathodic reactions and shows that H2S can accelerate slightly the corrosion. The RCS has greater Rp than the MB for any aeration conditions. The presence of alloying elements in RCS justifies this behavior. The morphology of corrosion was examined under an optical microscope (MO) and shows that uniform corrosion is predominant

AVALIAÇÃO DA CORROSÃO EM REGIÃO SOLDADA E NO METAL BASE DE TUBO API 5L X80 EM MEIO CONTENDO SULFETO DE HIDROGÊNIO