Masters Theses

Abstract

"Polythioether that have aliphatic backbones and chelating groups may be used to provide a hydrophobic coating by forming a pseudopassive layer on a steel surface. To verify this assumption, binary condensation copolymers of 1,2-ethane dithiol and 1,3-propane dibromide, 1,4-butane dibromide and 1,6-hexane dibromide were prepared. Yield ranged from 55 to 89% with molecular weight of 1 to 2 x 104. The polymers were synthesized via phase transfer polycondensation process with and without the presence of water. The polymers were characterized by DSC, FT-IR, 1H and 13C NMR spectroscopy.

The synthesized polymers were then used as corrosion inhibitors. Their corrosion inhibiting properties were studied through the effect of their adsorptions from a dilute solution onto mild steel and through their use as surface pretreatment. Corrosion tests using salt-fog cabinet, Q-UV condensation cycle, and flash-rust test using 98% humidity chamber were carried out. The result indicated that these polymers had a high degree of crystallinity which was detrimental to its use as a corrosion inhibiting additive.

In addition, a new method to evaluate the flash-rust test utilizing an integrating visible color spectroscopy was also developed to overcome the subjective and limited existing method which uses human eyes as the measuring instrument. The quantitative measurement done by this new method indeed showed a better accuracy and reproducibility in evaluating flash-rusting."--Abstract, page iii.

Advisor(s)

Van-De-Mark, Michael R.

Committee Member(s)

Stoffer, James O.
Findley, Marshall E., 1927-1991

Department(s)

Chemistry

Degree Name

M.S. in Chemistry

Comments

Electronic access to the full-text of this document is restricted to Missouri S&T users. Print thesis not available at Missouri S&T Library.

Scan made from microfilm is best quality available.

Publisher

University of Missouri--Rolla

Publication Date

Summer 1990

Pagination

viii, 75 pages

Note about bibliography

Includes bibliographical references (pages 72-74).

Rights

© 1990 Emerentiana Sianawati, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Subject Headings

Coatings Corrosion and anti-corrosivesPolymers

Thesis Number

T 6104

Print OCLC #

22934532

Electronic OCLC #

930140150

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