Gold - Imitating and Anti - Fingerprint Coating Process Test of Brass Ornaments

Abstract

Gold - imitating brass ornaments have poor corrosion resistance and are prone to get dirty, diminishing the adornment effect. In this work, a SiO2 based film was deposited on the brass substrate by reactive magnetron sputtering process, followed by an anti - fingerprint (AF) film of organic fluoride deposited by vacuum evaporation method. The AF film’s performances in the aspects of color, hydrophobicity, lipophobicity, abrasion resistance and corrosion resistance were tested through the spectrophotometer, contact angle tester, friction coefficient tester and corrosion test chamber, etc. Results showed that a depositing time for SiO2 - based film within 150 s and for AF film within 600 s and an initial vacuum degree no more than 4.5×10-3 Pa could not only narrow the color difference between brass and pure gold, but also improve the contact angle, abrasion resistance and corrosion resistance of the AF film. If deposited with suitable process parameters, brass ornaments deposited the AF film could obtain excellent golden color and anti - smudging performance simultaneously.

Keywords

• brass ornaments|gold - imitating|anti - smudging|vacuum evaporation depositing|anti - fingerprint film