Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (39권1호 13-17)

Effects of Naphthalene Trisulfonic Acid on the Surface Properties of Electrodeposited Ni Layer

Naphthalene Trisulfonic Acid가 니켈 전착층의 표면 특성에 미치는 영향

이주열;김만;권식철;김정환;김인곤;
Lee Joo-Yul;Kim Man;Kwon Sik-Chol;Kim Jung-Hwan;Kim In-gon;

한국기계연구원 표면기술연구센터;동의대학교 재료금속공학과;
Surface Technology Research Center, Korea Institute of Machinery & Materials;Department of Materials and Metallurgical Engineering, Dong-eui University;

Abstract

The effects of an organic additive, naphthalene trisulfonic acid (NTSA), contained in the nickel sulfamate bath on the surface properties of the electrodeposited nickel layer were investigated through electrochemical technique, x-ray diffraction analysis, and microscopic observation. The addition of NTSA facilitated the oxidation process of electrodeposited nickel layer during anodic scan and also increased the hardness and internal stress of the nickel film as the applied current density became higher. It seems that NTSA modulated the deposit structure during electrodeposition and so induced higher distribution of (110) orientation with respect to (200). With the increase of the NTSA in the bath, nickel layer was formed in small grain size, which resulted in enhanced surface evenness and brightness.

Keywords

Nickel film;Nickel sulfamate bath;Organic additive;Naphthalene trisulfonic acid;