Corrosion of Aluminium
By K. F. Lorking, J. Mayne. 2007
294 citations recorded by the source corpus.
The corrosion of aluminium at room temperature has been investigated in nine decinormal solutions over the pH range 2.0–12.0. Corrosion was dependent more on the nature of the anion than on the pH of the solution. The solubilities of hydrated and anhydrous aluminium oxide were examined and it was concluded that, except in the presence of chloride ions, corrosion was associated with the initial rate of solution of the anhydrous oxide. Potential and anodic polarisation measurements indicated that whereas the normal anodic reaction is the formation of anhydrous oxide, in the presence of chloride, bromide and iodide ions soluble aluminium salts are formed. It is suggested that when aluminium, carrying its air-formed film, is immersed in a solution in the presence of oxygen, the film breaks down and a small corrosion current commences to flow. In the absence of chlorides, and similar ions, film repair can take place and the behaviour of the aluminium is controlled by the relative rates of film repair and film breakdown. In the presence of chlorides film repair does not occur and once corrosion has been initiated by film breakdown it proceeds apace. If initiation is suppressed, by saturating the solution with aluminium oxide, corrosion is inhibited.
Subfields: Civil and Structural Engineering, Materials Chemistry, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/7fe088242c388162494ed78d9bb92407ff85106e
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In Civil and Structural Engineering
In Materials Chemistry
- Stewart W. Williams
- Paul A. Colegrove
- Jialuo Ding
- A. Addison
- R. Wood
- F. C. Walsh
- Filomeno Martina
- Karan S. Derekar
In Mechanical Engineering
- Stewart W. Williams
- Jialuo Ding
- Filomeno Martina
- Paul A. Colegrove
- Karan S. Derekar
- A. Addison
- R. Wood
- Ahmet Taşdemir
Citations in the corpus
- Developments in electrode materials and electrolytes for aluminium-air batteries (2013, background): “Those results are not detailed here because limitations of the technique meant the use of potentials more positive than those experienced by the aluminium anode in the battery [101,102].”
- Localized corrosion of a 2219 aluminium alloy exposed to a 3.5% NaCl solution (2010, background): “This may be consistent with the theory that when the pit is ‘‘sealed” by the corrosion products, there is no further exchange of reactants and the localized corrosion stops [2].”
- Corrosion behaviour of 6063 aluminium alloy in acidic and in alkaline media (2017, background): “Phosphoric acid medium is widely used for acid cleaning and elector polishing of aluminium (Christian Vargel, 2004).”
- Wire + Arc Additive Manufacturing (2016, background): “First, with the increasing usage of carbon fibre reinforced polymers, aircraft designers are forced to shift from aluminium to titanium, the former being electrochemically incompatible with carbon.(4) Second, with the current and forecast aircraft market expansion rate, the demand for titanium parts”