시편의 준비 방법 및 접촉저항이 알루미늄 합금의 아노다이징 피막 형성에 미치는 영향

• Published in: Biuletyn Uniejowski Vol. 53; no. 1; pp. 29 - 35
• Main Author: 문성모(Sungmo Moon)
• Format: Journal Article
• Language: Korean
• Published: 한국표면공학회 2020
• Subjects: 기계공학; Contact resistance; Al alloy; specimen preparation method; Anodizing; Anodic Oxide Film
• ISSN: 1225-8024; 2299-8403; 2288-8403

In this study, five different specimen preparation methods were introduced and their advantages and disadvantages were presented. One of them, an epoxy mounting method has advantages of constant exposure area, ease of surface preparation without touching the specimen surface during polishing or cleaning, use of small amount of material and ease of specimen reuse by polishing or etching. However, in order to eliminate unexpected errors resulting from preferable reaction at the specimen/epoxy interface and contact resistance between the specimen and copper conducting line for electrical connection, it is recommended to cover the wall side of the specimen with porous anodic oxide films and to remain the contact resistance lower than 1 ohm. The increased contact resistance between the specimen and Cu conducting line appeared to result in increases of anodizing voltage and solution temperature during anodizing by which thickness and hardness of anodizing film on Al2024 alloy were drastically decreased and color of the films became more brightened.