The effect of the addition of neodymium rare earth on Al-5Zn-0.5Cu alloy was investigated with Optical Microscope (OM), Differential Scanning Calorimetry (DSC), and Cyclic Polarization. The content variable of neodymium tested was 0.1wt%, 0.3wt%, dan 0.5wt%. Observation with OM was conducted to see the changes of the SDAS and the precipitate formation. DSC was used to identify the phase transformation and solidification process of the intermetallic phase. Cyclic Polarization was used to know the corrosion characteristics of Al-5Zn-0.5Cu-xNd. The presence of neodymium formed precipitates on the grain boundary which made shorter SDAS. Addition of neodymium as an alloying element of Al-5Zn-0.5Cu sacrificial anode may decrease pitting corrosion resistance and reduce the size of the loop. This behavior will be more preferable for Al Anode because the indication of more uniform attack.
|IOP Conference Series: Materials Science and Engineering
|Published - 12 Nov 2019
|19th International Union of Materials Research Societies - International Conference in Asia, IUMRS-ICA 2018 - Bali, Indonesia
Duration: 30 Oct 2018 → 2 Nov 2018
- Aluminium alloy
- Rare earth
- Sacrificial anode