Synthesis and evaluation of biopolymers as low toxicity corrosion inhibitors for North Sea Oil fields

Nihal Obeyesekere, Ali Naraghi, John S. McMurray

Research output: Contribution to journalConference articlepeer-review

11 Scopus citations

Abstract

The paper describes the synthesis and evaluation of a series of environmentally friendly corrosion inhibitors. These products were designed especially to use in North Sea Oil fields and in other environmentally sensitive areas as green inhibitors of CO2 corrosion. More than thirty peptides, some with random amino acid sequences and some ordered copolymers were synthesized by solid phase peptide techniques using the Fmoc/tert-butyl protection strategy. In these syntheses the C-Terminal residue was coupled to a resin and peptides were built out either by adding various Fmoc-Xxx-Yyy- Zzz units or by sequential addition of Fmoc-amio acids. The tri-peptide segments were synthesized in an aqueous solution by the successive addition of three Nhydroxysuccinimide esters of amino acids. In sequential addition, a single activated amino acid was added one at a time to the growing peptide on the solid support until the desired length was reached. The peptides were screened as corrosion inhibitors by exposure test. The promising candidates were again screened by RCE tests for performance. A few biopolymers were selected which were then subjected to a battery of tests as watersoluble green chemicals. Finally, two biopolymers were selected with low toxicity, moderate corrosion protection, high biodegradability, and low bioaccumulation.

Original languageEnglish (US)
JournalNACE - International Corrosion Conference Series
Volume2001-March
StatePublished - 2001
EventCorrosion 2001 - Houston, United States
Duration: Mar 11 2001Mar 16 2001

Keywords

  • Biopolymers
  • Corrosion inhibitors
  • Green chemistry
  • Low toxicity
  • Rotating cylinder electrode test
  • Solid phase peptide synthesis

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • General Materials Science

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