Preparation of the Eu-Co-Ni-B coating from anhydrous ethanol at low temperature and effects of heat treatment on the coating

Abstract

In this paper, the Eu-Co-Ni-B coating was successfully prepared on the surface of copper from anhydrous ethanol at low temperature (40 °C) by electroless plating. The surface morphology of the coating was observed using Scanning Electron Microscopy (SEM), the composition was analyzed by Energy Dispersive X-Ray Spectroscopy (EDX), while the structure was studied by the X-ray Diffraction (XRD). In order to investigate the effects of heat treatment on the Eu-Co-Ni-B coating, the coating was heat treated at 200 °C, 400 °C, 600 °C and 800 °C for 40 min. The results showed that the Eu-Co-Ni-B coating changed from amorphous to crystalline. Open circuit potential (OCP) measurements and potentiodynamic polarization (PDP) experiments were carried out in 3 wt. % NaCl and 1 M NaOH to determine the anticorrosion performance of the coating. The 400 °C annealed coating showed notable improvement in corrosion properties.

Graphical Abstract

Keywords:

• Electroless plating
• Eu-Co-Ni-B coating
• heat treatment
• corrosion resistance

Subject classification codes:

• O646

Additional information

Funding

This work was supported by the [National Nature Science Foundation of China #1] under Grant [number 21553002]; [Qinghai Provincial Science and Technology Department #2] under Grant [number 2016-ZJ-753].