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Title: CORROSION PROTECTION OF ALUMINUM

Abstract

Treatment of aluminum-base metal surfaces in an autoclave with an aqueous chromic acid solution of 0.5 to 3% by weight and of pH below 2 for 20 to 50 hrs at 160 to 180 deg C produces an extremely corrosion-resistant aluminum oxidechromium film on the surface. A chromic acid concentration of 1 to 2% and a pH of about 1 are preferred. (D.C.W.)

Inventors:
;
Publication Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4702065
Patent Number(s):
US 3096220
Assignee:
U.S. Atomic Energy Commission DTIE; NSA-17-029292
Resource Type:
Patent
Resource Relation:
Patent File Date: 1960 Oct 31; Other Information: Orig. Receipt Date: 31-DEC-63
Country of Publication:
United States
Language:
English
Subject:
METALS, CERAMICS, AND OTHER MATERIALS; ACIDITY; ALUMINUM; ALUMINUM OXIDES; CHROMIUM OXIDES; CORROSION PROTECTION; FILMS; SOLUTIONS; SURFACES

Citation Formats

Dalrymple, R.S., and Nelson, W.B. CORROSION PROTECTION OF ALUMINUM. United States: N. p., 1963. Web.
Dalrymple, R.S., & Nelson, W.B. CORROSION PROTECTION OF ALUMINUM. United States.
Dalrymple, R.S., and Nelson, W.B. 1963. "CORROSION PROTECTION OF ALUMINUM". United States. doi:.
@article{osti_4702065,
title = {CORROSION PROTECTION OF ALUMINUM},
author = {Dalrymple, R.S. and Nelson, W.B.},
abstractNote = {Treatment of aluminum-base metal surfaces in an autoclave with an aqueous chromic acid solution of 0.5 to 3% by weight and of pH below 2 for 20 to 50 hrs at 160 to 180 deg C produces an extremely corrosion-resistant aluminum oxidechromium film on the surface. A chromic acid concentration of 1 to 2% and a pH of about 1 are preferred. (D.C.W.)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1963,
month = 7
}
  • Treatment of aluminum-base metal surfaces in an autoclave with an aqueous chromic acid solution of 0.5 to 3% by weight and of pH below 2 for 20 to 50 hrs at 160 to 180 deg C produces an extremely corrosion-resistant aluminum oxidechromium film on the surface. A chromic acid concentration of 1 to 2% and a pH of about 1 are preferred.
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  • Inland Steel Co.'s new invention offers combined strengthening and corrosion protection to a ferrous-metal pipeline by wrapping around it a ferrous-metal strip coated with a less noble metal, such as zinc, aluminum, or one of their alloys. The strip is under sufficient tension to strengthen and reinforce the pipe or arrest fracture propagation. The less noble metal coating of the strip is electrically connected to the pipe to provide cathodic protection for the pipe. A coating of electrically insulating material may be interposed between the pipe and the wrap. An external power source may be utilized for primary cathodic protection,more » in which case the coated strip is used as a secondary or backup system.« less