Coloured ANOF layers on aluminium

Abstract

By addition of metal salts to a basic electrolyte as colouring components coloured ANOF layers can be produced. The colour shades of such layers are dependent on concentration and deposition parameters. Two application examples of coloured ANOF layers are demonstrated.

Characterization and wear- and corrosion-resistance of microarc oxidation ceramic coatings on aluminum alloy

“…The MAO process combines the electrochemical oxidation with a high voltage spark treatment in an aqueous electrolytic bath whose dissolved salt (e.g. silicates) can be decomposed to generate modifying elements to the alumina coating [7,8]. With the introduction of hard ceramic coatings by means of microarc oxidation, the wear resistance, corrosion resistance, mechanical strength, and electrical insulation of the metals and their alloys can be effectively increased [9][10][11][12][13].…”

Preparation of black PEO layers on Al–Si alloy and the colorizing analysis

“…Characterization of the PEO coating 3.1.1. PEO coating and the CIELAB color space model NH 4 VO 3 and Na 2 WO 4 were both added into the electrolyte to deposit the black PEO layers in this research, which was different from the single additive [8]. To get a proper proportion of the two colorants, their total concentration was kept constant.…”

Electrolyte–Plasma Processing and Deposition of Coatings on Metals and Alloys

“…Некоторые из основных характеристик разрядов в оксидных плен-ках, выращенных на алюминии, собраны в табл. 1 [10, 24,32].…”

“…возможно-сти использования поверхностных разрядов для нанесения оксидов на различные металлы изучалась очень детально в России Снежко с соавторами [8][9][10][11][12][13], Марковым с соавторами [14][15][16], Федоровым и т.д. [17], Гордиенко с соавторами [8][9][10][11][12][13][14][15][16][17][18][19][20] и в Германии Kurze с соав-торами [21][22][23][24]. На этой стадии появились первые попытки про-мышленного применения [25][26][27][28][29].…”