Effect of Ambient Aging on Inhibition of Oxygen Reduction by Chromate Conversion Coatings

• Published in: Corrosion (Houston, Tex.) Vol. 59; no. 4; pp. 356 - 362
• Main Authors: Zhang, W., Buchheit, R.G.
• Format: Journal Article
• Language: English
• Published: Houston, TX NACE International 01.04.2003; NACE
• Subjects: Ageing; Aging; Ambient temperature; Applied sciences; Atmospheric conditions; Cathodic coating (process); Cathodic polarization; Chemical reduction; Chromate; Chromate coatings; Chromating; Coated electrodes; Coatings; Conversion coatings; Corrosion; Corrosion prevention; Cracks; Electron microscopy; Exact sciences and technology; Heat treatment; Heat treatments; High temperature; Immobilization; Inhibition; Metals. Metallurgy; Oxygen; Oxygen reduction reactions; Protective coatings; Shrinkage; Substrates; Heat treatment; Aluminium base alloys; Conversion coating; AA2024-T3; Corrosion inhibition; Experimental study; Corrosion protection; Corrosion inhibitor; chromate conversion coatings; Oxidation; cathodic inhibition; aging; oxygen reduction reaction; Oxidation protection

ABSTRACTSoluble chromates and chromate conversion coatings (CCCs) are used to enhance corrosion resistance of aluminum alloys.1 However, chromates are toxic and carcinogenic, and it is expected that their use will be banned in the future. Despite the wide usage of CCCs, elements of chromate corrosio...