Title

The Compatibility Of Various Metals And Carbon With Liquid Fluorine

Description

Experimental studies were made to determine the compatibility and resistance to corrosion of various metals and carbon with liquid fluorine at -320°F. The metals tested were various alloys of aluminum, stainless steel including high-strength steels, titanium, copper, Monel metal, nickel, and magnesium. Tests which were performed included: continuous immersion of stressed and unstressed samples in liquid fluorine for periods up to two weeks; impact ignition of titanium and aluminum in liquid fluorine and of titanium in liquid oxygen at impact energy levels ranging from 2.6 to 65 ft-lb; intensive and extensive impact on tubes containing liquid fluorine; passivation and storage for periods up to 64 days followed by immersion in liquid fluorine; thermal shock of samples, both by liquid fluorine and in contact with liquid fluorine; flexing of metal samples immersed in liquid fluorine; tearing of metal samples while immersed in liquid fluorine; the explosibility of contaminant in liquid fluorine

It was found that the corrosion of the metals tested in pure liquid fluorine was negligible, generally amounting to less than 1 mil penetration per year. However, contamination of liquid fluorine can result in sever corrosion. Graphitic carbon was found to be incompatible although dense amorphous carbon was affected only slightly. Titanium was found to ignite upon impact in liquid fluorine although the ignition did not propagate. no evidence was found to support the theory that a fluoride thin film is required to protect metals from attack by liquid fluorine,

Passivation by gaseous fluorine is recommended as an extension of the cleaning procedure despite the lack of real evidence that passivation is required for materials which have been thoroughly cleaned.

Date

1960

Index Abstract

Contrails only

Photo Quality

Incomplete

Report Number

WADD TR 60-436

Creator

Sterner, Charles J.

Singleton, Alan H.

Corporate Author

Air Products, Inc.

Laboratory

Materials Central

Extent

110

Identifier

AD0244309

AD0244309

Access Rights

ASTIA

Distribution Classification

1

Contract

AF 33(616)-6515

DoD Project

7312

DoD Task

73122

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

ASD LTR

Report Availability

Full text available by request

Date Issued

1960-08

Abstract

Experimental studies were made to determine the compatibility and resistance to corrosion of various metals and carbon with liquid fluorine at -320°F. The metals tested were various alloys of aluminum, stainless steel including high-strength steels, titanium, copper, Monel metal, nickel, and magnesium. Tests which were performed included: continuous immersion of stressed and unstressed samples in liquid fluorine for periods up to two weeks; impact ignition of titanium and aluminum in liquid fluorine and of titanium in liquid oxygen at impact energy levels ranging from 2.6 to 65 ft-lb; intensive and extensive impact on tubes containing liquid fluorine; passivation and storage for periods up to 64 days followed by immersion in liquid fluorine; thermal shock of samples, both by liquid fluorine and in contact with liquid fluorine; flexing of metal samples immersed in liquid fluorine; tearing of metal samples while immersed in liquid fluorine; the explosibility of contaminant in liquid fluorine

It was found that the corrosion of the metals tested in pure liquid fluorine was negligible, generally amounting to less than 1 mil penetration per year. However, contamination of liquid fluorine can result in sever corrosion. Graphitic carbon was found to be incompatible although dense amorphous carbon was affected only slightly. Titanium was found to ignite upon impact in liquid fluorine although the ignition did not propagate. no evidence was found to support the theory that a fluoride thin film is required to protect metals from attack by liquid fluorine,

Passivation by gaseous fluorine is recommended as an extension of the cleaning procedure despite the lack of real evidence that passivation is required for materials which have been thoroughly cleaned.

Type

report

Provenance

Lockheed Martin Missiles & Fire Control

Subject

Alloys

Aluminum Alloys

Carbon

Copper Alloys

Corrosion

Degradation

Explosives

Fluorine

Furniture

Graphite

Ignition

Impact Shock

Liquids

Magnesium Alloys

Metals

Nickel Alloys

Oxygen

Stainless Steel

Titanium Alloys

Publisher

Wright-Patterson Air Force Base, OH : Wright Air Development Division, Air Research and Development Command, United States Air Force

Format

vi, 110 pages : ill. ; 28 cm.

Distribution Conflict

No