Studies on Color-Anodizing without Dyestuff on Aluminum in Mixed Solution of Aliphatic Acid, Sulfamic Acid and Sulfuric Acid

DOI

Bibliographic Information

Other Title
  • 脂肪族有機酸, スルファミン酸, 硫酸混合液によるアルミニウムの陽極発色について

Abstract

The following results were obtained from the study of anodic treatment on aluminum or aluminum alloys in the mixed solution of aliphatic acid, sulfamic acid and sulfuric acid:<br>1. Appropriate bath composition was of 25-30g/l of tartaric acid, 100-110g/l of sulfamic acid and 5-6g/l of sulfuric acid, with which fairly stable anodizing was possible.<br>2. The bath of the said composition, like that of prevailing mixtures of aromatic and sulfuric acid, produced various colors such as gold, amber, bronze, black, etc. according to the control of anodizing conditions and to the selection of aluminum or aluminum alloys, furthermore its cost was lower.<br>3. Dissolved aluminum amount in the bath had significant effects on the color value, and it was necessary to maintain the amount within a range of 0-1g/l.<br>4. Mean hardness of the cross section of the coating obtained under the condition of 2-3A/dm2 of current density, 50-60V of maximum voltage and 25°C of bath temperature, was 650HmV; despite the room temperature-anodizing the hardness was thus high.<br>5. In general, a bath temperature of a little over 20°C was recommendable, and adjusting the composition of the mixed solution seemed to permit satisfactory work even in a higher anodizing temperature such as 30-35°C.

Journal

Details 詳細情報について

  • CRID
    1390282679092485632
  • NII Article ID
    130003809347
  • DOI
    10.4139/sfj1950.18.459
  • ISSN
    18843395
    00260614
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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