Effect of substrate contaminants on the performance of fusion-bonded epoxy pipeline coatings. Final report, January 1, 1989 to December 31, 1991
Fusion-bonded epoxy (FBE) pipeline coatings can be adversely affected by the presence of soluble contaminants on the blasted steel pipe surface. The principal soluble contaminants are ionic salts. FBE coatings applied on ion-contaminated steel surfaces are susceptible to osmotic blistering, reduced tensile bond strength, and decreased cathodic disbonding resistance. Pipeline owners and coaters need simple straightforward test methods for the rapid determination of soluble salt contamination on pipe at the coating mill. The overall objective of this program was to develop the requisite sampling techniques, analytical methodologies, and testing protocols for the rapid, in-plant assessment of ionic contaminant concentration levels on the surface of production pipe. An important basic objective of the program was to establish threshold limit values for FBE coatings applied over steel surfaces contaminated with chloride, sulfate, nitrite, nitrate, and ferrous ions. This report is divided into four sections. The first section introduces the program objectives. The second section describes the experimental work involved in conducting the laboratory and in-plant studies. In Section 3, the results of the experimental work conducted during this program on ion-contaminated steel substrates and FBE coatings are discussed. Section 4 contains the conclusions.
- Research Organization:
- American Gas Association, Inc., Arlington, VA (United States). Pipeline Research Committee; Midwest Research Inst., Kansas City, MO (United States)
- Sponsoring Organization:
- American Gas Association, Inc., Arlington, VA (United States)
- OSTI ID:
- 10195009
- Report Number(s):
- AGA--94003341; ON: UN94003341
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fundamental research on disbonding of pipeline coatings. Final report, April 1, 1991-December 31, 1995
Assessment of the effects of surface preparation and coatings on the susceptibility of line pipe to stress-corrosion cracking
Related Subjects
360102
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102
CHEMICAL ANALYSIS
CHEMICAL AND SPECTRAL PROCEDURES
CHEMICAL REACTIONS
CORROSION
DESIGN
EPOXIDES
FIELD TESTS
FOULING
IONS
PIPELINES
PROGRESS REPORT
PROTECTIVE COATINGS
SALTS
SAMPLING
STRUCTURE AND PHASE STUDIES