Corrosion Resistance Test of Electroplated Gold and Palladium Using Fast Electrochemical Analysis

Abstract

Noble metal coatings are commonly employed to improve corrosion resistance of metals in the electronic and jewellery industry. The corrosion resistance of electroplated goods is currently determinate with long, destructive and almost subjective interpretation corrosion tests in artificial atmosphere. In this study we present the application of electrochemical analysis to obtain fast and numerical information of the antiaging coating. We performed open circuit potential (OCP) and corrosion current measurement; we employed also the electrochemical impedance spectroscopy (EIS), commonly applied to organic or passivated metal with high-impedance, to find the best option for noble low-impedance coating analysis. For comparison, traditional standardized tests (damp heat ISO 17228, salt spray ISO 9227 and sulphur dioxide ISO 4524) were also performed.

All Silica Micro-Fluidic Flow Injection Sensor System for Colorimetric Chemical Sensing

“…The last stage in the microcell fabrication process included the sputtering of a reflective layer on the outer end of the sensor's end cap. Since the sensor is intended to operate in both acidic and alkaline environments, i.e., where the pH changes in the range of 2 to 14, gold (Au) was chosen as the reflective layer material [50]. The Au was also chosen as the reflective layer due to an acceptable reflectance [51].…”

A Study on the Tribological Behaviors of a Pin Coated with Layer-by-Layer Gold/Nickel Materials within an Electrical Connector

“…Among all of the coating materials, harmless gold and nickel [6], which act as protective coatings, are widely applied in various scenarios due to their superior surface properties like low resistivity, excellent anti-corrosion quality, and low propensity to form alien film on a contact's surface. Several typical strategies for fabricating a gold/nickel coating, mainly including electroplating and magnetron sputtering, have universally attracted attention, and substantial research has been carried out [7,8].…”

Rapid Colorimetric Detection of Heavy Metal Hg2+ in Cosmetics Based on Amrinone‐Modified AuNPs Sensor

“…[9] The conventional methods for the detection and analytical control of elemental mercury in cosmetics contain atomic absorption spectrometry (FAAS), [10,11] atomic fluorescence spectrometry, [12,13] graphite furnace atomic absorption spectrometry, [14] inductively coupled plasma emission spectrometry, [15] inductively coupled plasma mass spectrometry, [16,17] and electrochemical analysis. [18][19][20] Although the above methods have many advantages, e. g. high sensitivity, simple operation, good portability, and multi-ions parallel analyses, these methods hold their disadvantages, such as the complicated sample preparation processes, the expensive instruments, and the non-visualization of results. [21] Therefore, it is necessary to develop a simple, effective, and rapid detection method of mercury in cosmetics.…”