Document Type

Thesis

Degree

Master of Science (MS)

Department

Materials Science and Engineering

First Advisor's Name

Norman Munroe

First Advisor's Committee Title

Committee Chair

Second Advisor's Name

Benjamin Boesl

Second Advisor's Committee Title

Committee Member

Third Advisor's Name

Kingsley Lau

Third Advisor's Committee Title

Committee Member

Fourth Advisor's Name

Zhe Cheng

Fourth Advisor's Committee Title

Committee Member

Keywords

Evaluation of Organic Coatings, Corrosion, Sour Gas, Coatings Degradation, Electrochemical Testing, Autoclave

Date of Defense

11-24-2015

Abstract

The purpose of this study was to examine the performance of several generic types of organic protective coatings as a corrosion protection method for the interior of subsea pipelines in sour gas media. The sour gas environment was simulated in the laboratory by the use of an Autoclave and the performance of the organic coatings was studied via the use of Electrochemical Impedance Spectroscopy (EIS) and Linear Polarization Resistance (LPR) tests to determine the coatings resistance, capacitance and corrosion behavior before and after the exposure to sour gas environment. The coating degradation and the corrosion products formed were examined by the use of SEM/EDS. The results indicated that both FBE and Novolac Epoxy coatings had excellent adhesion properties and chemical resistance. The Amine-Cured Novolac Epoxy coating exhibited good adhesion properties and chemical resistance. However, the Phenolic Epoxy coating started to degrade over time and corrosion took place under the coating.

Identifier

FIDC000201

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