Piper Nigrum (Green Corrosion Inhibitor) as a Modified Quenchant in Heat Treatment of Ductile Iron
| Autor: | Bulan Abdullah, N Hazirah, Siti Khadijah Alias, Mohd Faizul Idham, S H Nasip |
|---|---|
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Materials Science and Engineering. 1176:012027 |
| ISSN: | 1757-899X 1757-8981 |
| DOI: | 10.1088/1757-899x/1176/1/012027 |
| Popis: | Corrosion of ductile iron leads to many consequences in all its application aspects, like a structural failure due to the porosity formation, which is consequenced by corrosive chemical exposure. Hence, this project was carried out to modify the water quenchant using Piper Nigrum (black pepper) essence, as a green corrosion inhibitor, in promoting corrosion resistance towards austenitized ductile iron in hydrochloric acid (HCl). Furthermore, its effects on the hardness and microstructure of austenitized ductile iron were also investigated. The modified quenchant employed in the austenitizing process was modified by diluting Piper Nigrum extract to several concentrations. The corrosion resistance performance of ductile iron quenched by this modified quenchant was tested using the gravimetric method. The samples were exposed to 1 molar (M) of HCl for 2 hours in the method. This study’s novelty has proved that the Piper Nigrum extract was successfully used as an alternative quenchant to reduce ductile iron’s corrosion rate in HCl and its corrosion resistance performance was equipotential to other synthetic inhibitors practiced conventionally. This approach could replace the use of synthetic inhibitor, which is harmful and costly. The gravimetric test showed that the corrosion rate of austenitized ductile iron decreased to 51.2685 mm/year and inhibition efficiency increased to 72.17% as the extract’s concentration of quenchant increased to 15%. This extract’s presence as a quenchant in the heat treatment process neither improved nor exacerbated the samples’ mechanical properties, and it has not changed the behavior of microstructure transformation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|