Scholarlink

Abstract <p>Isotherms of the sorption of water vapor by aluminum powders of different grades (ASD-4, ASD‑6, PA-2, PA-4, PAD-2, PAD-4, PAP-1, and PAP-2) are determined experimentally. The sorption of water vapor with ASD, PA, PAD powders begins at humidities above 80%. The kinetics of the chemical reaction between water vapor and aluminum is characterized by an induction period whose duration depends on the grade of aluminum and the relative humidity of the air. A mechanism is proposed for the reaction between water vapor and aluminum powders, in which an important role is played by atomic hydrogen that is released in the main reaction and participates in a chemical reaction that destroys the oxide-hydroxide protective film on the granules of aluminum powders. The hygroscopicity of PAP powders is determined from the absorption of water vapor by the fatty film, and not by the aluminum itself.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Hygroscopic Properties of Industrial Aluminum Powders

  • 期刊论文

  • 发表日期：

    2025年9月16日

查看全文
  • A. G. Tereshchenko

摘要

Abstract

Isotherms of the sorption of water vapor by aluminum powders of different grades (ASD-4, ASD‑6, PA-2, PA-4, PAD-2, PAD-4, PAP-1, and PAP-2) are determined experimentally. The sorption of water vapor with ASD, PA, PAD powders begins at humidities above 80%. The kinetics of the chemical reaction between water vapor and aluminum is characterized by an induction period whose duration depends on the grade of aluminum and the relative humidity of the air. A mechanism is proposed for the reaction between water vapor and aluminum powders, in which an important role is played by atomic hydrogen that is released in the main reaction and participates in a chemical reaction that destroys the oxide-hydroxide protective film on the granules of aluminum powders. The hygroscopicity of PAP powders is determined from the absorption of water vapor by the fatty film, and not by the aluminum itself.