Accession Number:

ADA043160

Title:

A Chemical Treatment for Mercury Accidentally Spilled in Aircraft

Descriptive Note:

Technical rept.

Corporate Author:

ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (UNITED KINGDOM)

Personal Author(s):

Report Date:

1977-01-31

Pagination or Media Count:

31.0

Abstract:

Tests were made to determine the susceptibility of commercially pure aluminium, and of high strength Al-Zn-Mg-Cu and Al-Cu alloys to embrittlement by mercury. Commercially pure aluminium to BS L16 is not embrittled by mercury. DTD 5050B Al-Zn-Mg-Cu is very susceptible to mercury embrittlement cracking occurred when the alloy was stressed in the short transverse direction at 5 of the 0.2 proof stress. DTD 5020A Al-Cu is more resistant to mercury embrittlement, although it cracked when stressed in the short transverse direction at 60 of the 0.2 proof stress. A Chemical technique using silver nitrate was developed to immobilise and render relatively harmless any elemental mercury accidentally spilled in aircraft. The corrosion and stress-corrosion hazards to alloys DTD 5020A and DTD 5050B, associated with silver nitrate and the products of its reaction with mercury, have been investigated.

Subject Categories:

  • Aircraft
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE