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Title: Surface changes in well-casing pipe exposed to high concentrations of organics in aqueous solution. Special report

Abstract

This preliminary study was undertaken to assess how the surface structural characteristics of four common well casing materials-polyvinyl chloride (PVC), Teflon (polytetrafluoroethylene, PTFE), stainless steel 304 (SS304) and stainless steel 316 (SS316)-are affected by exposure to an aqueous solution containing tetrachloroethylene, toluene, p-dichlorobenzene and 0-dichlorobenzene in concentrations near their solubility. Casing samples that had been exposed to a test solution for 1 week, 1 month and 6 months were examined with a scanning electron microscope (SEM) and compared with control samples placed in well water for an equivalent time period. Pieces of casing that had not been placed in any aqueous solution were also examined and are assumed to be representative of the initial structure of the casing's surface. These organics are of concern at hazardous waste sites, where they often occur in ground water. The observations indicate that the surface characteristics of PVC, SS316 and SS304 did not change when exposed to the organic aqueous solution. The surface variability and lack of distinguishing features at high magnification made it difficult to tell if the PTFE surface had changed. However, no obvious changes (swelling, pitting etc.) were seen.

Authors:
;
Publication Date:
Research Org.:
Cold Regions Research and Engineering Lab., Hanover, NH (USA)
OSTI Identifier:
6652444
Report Number(s):
AD-A-222447/5/XAB; CRREL-SR-90-7
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 36 MATERIALS SCIENCE; CHLORINATED ALIPHATIC HYDROCARBONS; ENVIRONMENTAL EFFECTS; CHLORINATED AROMATIC HYDROCARBONS; GROUND WATER; CONTAMINATION; TOLUENE; WELL CASINGS; CORROSION; AQUEOUS SOLUTIONS; ELECTRON MICROSCOPY; PVC; SOLUBILITY; STAINLESS STEEL-304; STAINLESS STEEL-316; SURFACE PROPERTIES; WATER POLLUTION; ALKYLATED AROMATICS; ALLOYS; AROMATICS; AUSTENITIC STEELS; CHEMICAL REACTIONS; CHROMIUM ALLOYS; CHROMIUM-NICKEL STEELS; CHROMIUM-NICKEL-MOLYBDENUM STEELS; CORROSION RESISTANT ALLOYS; DISPERSIONS; HALOGENATED ALIPHATIC HYDROCARBONS; HALOGENATED AROMATIC HYDROCARBONS; HEAT RESIS; HEAT RESISTANT MATERIALS; HEAT RESISTING ALLOYS; HIGH ALLOY STEELS; HYDROCARBONS; HYDROGEN COMPOUNDS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; MICROSCOPY; MIXTURES; MOLYBDENUM ALLOYS; NICKEL ALLOYS; ORGANIC CHLORINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; ORGANIC POLYMERS; OXYGEN COMPOUNDS; POLLUTION; POLYMERS; POLYVINYLS; SOLUTIONS; STAINLESS STEELS; STEEL-CR17NI12MO3; STEEL-CR19NI10; STEELS; WATER; 540320* - Environment, Aquatic- Chemicals Monitoring & Transport- (1990-); 360604 - Materials- Corrosion, Erosion, & Degradation

Citation Formats

Taylor, S, and Parker, L. Surface changes in well-casing pipe exposed to high concentrations of organics in aqueous solution. Special report. United States: N. p., 1990. Web.
Taylor, S, & Parker, L. Surface changes in well-casing pipe exposed to high concentrations of organics in aqueous solution. Special report. United States.
Taylor, S, and Parker, L. 1990. "Surface changes in well-casing pipe exposed to high concentrations of organics in aqueous solution. Special report". United States.
@article{osti_6652444,
title = {Surface changes in well-casing pipe exposed to high concentrations of organics in aqueous solution. Special report},
author = {Taylor, S and Parker, L},
abstractNote = {This preliminary study was undertaken to assess how the surface structural characteristics of four common well casing materials-polyvinyl chloride (PVC), Teflon (polytetrafluoroethylene, PTFE), stainless steel 304 (SS304) and stainless steel 316 (SS316)-are affected by exposure to an aqueous solution containing tetrachloroethylene, toluene, p-dichlorobenzene and 0-dichlorobenzene in concentrations near their solubility. Casing samples that had been exposed to a test solution for 1 week, 1 month and 6 months were examined with a scanning electron microscope (SEM) and compared with control samples placed in well water for an equivalent time period. Pieces of casing that had not been placed in any aqueous solution were also examined and are assumed to be representative of the initial structure of the casing's surface. These organics are of concern at hazardous waste sites, where they often occur in ground water. The observations indicate that the surface characteristics of PVC, SS316 and SS304 did not change when exposed to the organic aqueous solution. The surface variability and lack of distinguishing features at high magnification made it difficult to tell if the PTFE surface had changed. However, no obvious changes (swelling, pitting etc.) were seen.},
doi = {},
url = {https://www.osti.gov/biblio/6652444}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 1990},
month = {Thu Mar 01 00:00:00 EST 1990}
}

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