1974•Journal of The Surface Finishing Society of JapanOpen access

Conversion Treatment of Aluminum and Aluminum Alloys with Ammoniacal Bath

Kaoru SAIKI, Yukio Ôkura

Abstract

The authors studied the effects of various sorts of amines and ammonium salts upon the formation bohmite film from ammonium base bath by chemical conversion. The results obtained were as follows. (1) Triethanolamine formed a stable chelate compound which accelerated the formation of bohmite film. (2) Ammonium carbonate had good effects upon the continuance of bath composition by the following reactions: 2Al+(NH4)2CO3+3H2O→2NH4AlO2+CO2+3H2, 2NH4AlO2+H2O→Al2O3+2NH4OH, 2NH4OH+CO2→(NH4)2CO3+H2O, (3) The ammonium hydroxide bath containing triethanolamine and ammonium carbonate continuously formed a very stable böhmite film on Aluminum and Aluminum alloys having no bad odor.

Open-access reader

About this research paper

What this paper is about

Why it matters

A significance statement is not available in the OpenAlex record.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

Key concepts: Triethanolamine, Ammonium hydroxide, Ammonium, Aluminium, Chemistry, Ammonium carbonate, Inorganic chemistry, Base (topology)