Corrosion of Aluminium Alloys by IRFNA
Abstract
Corrosion rate and related data have been obtained for 2014(3L65) aluminium alloy, either untreated or subjected to certain surface pre- treatments, before contact with IRFNA, gelled IRFNA (IRFNA + SiO2 + LiNO3) and these media containing added P2O5. The temperature dependence of the corrosion reaction in gelled IRFNA has also been studied electrochemically, using a 20 C temperature cycle. Similar temperature cycling data involving IRFNA were presented in the First Interim Report. The lowest corrosion rates determined by weight change occurred when the allow had been pre-treated with gaseous C1F3 before immersion in gelled IRFNA or gelled IRFNA containing 0.5 wt.% P2O5. The latter medium gave a low corrosion rate even in the absence of the C1F3 pre- treatment. Pre-treatment with a gaseous HF/F2 mixture or by electropolishing and anodising, before immersion in gelled IRFNA, conferred no advantage as judged electrochemically but these pre-treatments were not evaluated by weight change.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1991
- Accession Number
- ADA240807
Entities
People
- Jeremy P. Mauger
- Michael F. Dove
- Norman Logan
Organizations
- University of Nottingham