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Effect of inhibitors on the corrosion of automotive aluminum alloy in ethylene glycol-water mixture

Asadikiya, M ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.5006/1.3666860
  3. Publisher: 2011
  4. Abstract:
  5. The effect of some inhibitors consisting of sodium nitrite (NaNO 2), sodium nitrate (NaNO 3), sodium molybdate (Na 2MoO 4), and sodium silicate (Na 2SiO 3) on the corrosion behavior of aluminum alloy 3303 (UNS A93303) in a water and ethylene glycol (C 2H 6O 2) mixture was investigated. In the first part, the tests were established without any galvanic coupling. In the second part, the tests were established with galvanic connections between the aluminum alloy and mild steel, stainless steel, copper, brass, and solder. Results show that the best corrosion inhibitor in both situations is sodium nitrate, according to its abilities to reduce corrosion rate, passivate the aluminum surface, and stop pitting corrosion
  6. Keywords:
  7. Potentiodynamic test ; Aluminum surface ; Automotive aluminum ; Corrosion behavior ; Galvanic connection ; Galvanic corrosion ; Galvanic coupling ; Glycol-water mixture ; Potentiodynamic tests ; Sodium molybdate ; Sodium nitrates ; Sodium nitrite ; Sodium silicate ; Aluminum ; Aluminum alloys ; Carbon steel ; Corrosion rate ; Ethylene ; Ethylene glycol ; Pitting ; Silicates ; Sodium ; Stainless steel ; Corrosion inhibitors
  8. Source: Corrosion ; Volume 67, Issue 12 , 2011 ; 00109312 (ISSN)
  9. URL: http://corrosionjournal.org/doi/abs/10.5006/1.3666860