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Main Title Regeneration of chromated aluminum deoxidizers : improved diaphragm fabrication and performance /
Author Hicks, Harry C. ; Sekits., Donald F.
Other Authors
Author Title of a Work
Sekits, Hugh B.
CORP Author Boeing Commercial Airplane Co., Seattle, Wash.;Industrial Environmental Research Lab., Cincinnati, Ohio.
Publisher United States Environmental Protection Agency, Office of Research and Development, Industrial Environmental Research Laboratory,
Year Published 1977
Report Number EPA/600/2-77/194; D6-22251-16; EPA-S-803064
Stock Number PB-272 687
OCLC Number 05719616
Subjects Metals--Deoxidizing. ; Chromium. ; Salvage (Waste, etc.) ; Water--Pollution. ; Chromium. ; Metals--Deoxidizing. ; Salvage (Waste, etc.) ; Water--Pollution. ; Deoxidizing of metals
Additional Subjects Metal finishing ; Water pollution control ; Diaphragms(Engineering) ; Regeneration(Engineering) ; Fabrication ; Aluminum ; Chromium ; Toxicity ; Performance evaluation ; Cost analysis ; Reclamation ; Chemical cleaning ; Recirculation ; Crystallization ; Design criteria ; Chromating ; Electrolysis ; Deoxidizers ; Metal finishing industry ; Water pollution control equipment
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-2-77-194 Headquarters Library/Washington,DC 10/25/2011
EJBD  EPA 600-2-77-194 c.1 Headquarters Library/Washington,DC 03/17/2014
ESAD  EPA 600-2-77-194 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-272 687 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation viii, 29 p. : ill. ; 31 cm.
Abstract In the metal finishing industry highly concentrated hexavalent chromium solutions are used extensively to deoxidize aluminum surfaces prior to anodizing, conversion coatings, prepaint preparation, welding and adhesive bonding. A regeneration process was conceived and tested to reduce the frequency of discarding the spent chromated deoxidizers. The engineering techniques developed in this project involve reoxidation of trivalent chromium to the hexavelent state by electrolysis thru a diaphragm plus removal of undesirable dissolved metals by crystallization and separation. Results of the accomplished work establish that regeneration of chromated aluminum deoxidizers is feasible, practical and economical. In the second phase of this project diaphragm fabrication techniques were refined to produce an improved diaphragm in terms of cost and performance. In addition, electrolytic regeneration equipment installed in a large production tank for six months exceeded technical and economic objectives.
Notes Submitted in fulfillment of Phase II, grant no. S803064-01, between the United States Environmental Protection Agency and the Boeing Commercial Airplane Company. Project Officer: Hugh B. Durham. Includes bibliographical references (p. 27-28).
Place Published Cincinnati
Supplementary Notes See also report dated Dec 73, PB-231 835.
Corporate Au Added Ent Industrial Environmental Research Laboratory (Cincinnati, Ohio)
Corp Au Ser Add Ent United States. Environmental Protection Agency. Environmental protection technology series ; EPA-600/2-77-194 (Sept.)
PUB Date Free Form 1977
Series CORP Author United States Environmental Protection Agency.
Series Title Untraced United States. Environmental Protection Agency. Environmental protection technology series ; EPA-600/2-77-194 (Sept.)
NTIS Prices PC A03/MF A01
BIB Level m
Cataloging Source OCLC/T
OCLC Time Stamp 20140314150248
Language eng
Origin OCLC
OCLC Rec Leader 01908cam 2200397Ii 45020