Preparation and characterization of a new glass system inhibitor for mild steel corrosion in hydrochloric solution
- 作者：A. Majjanea ; D. Raira ; A. Chahinea ; M. Et-tabiroua ; M. Ebn Touhamib ; R. Touirb ; touir8@yahoo.fr
- 关键词：A. Vanadophosphate glasses ; B. FTIR ; B. XRD ; B. EIS ; C. Corrosion and inhibition ; C. Acidic medium
- 刊名：Corrosion Science
- 出版年：2012
- 期刊代码：28_0010938x
- 类别：ch
- 出版时间：July, 2012
- 卷：60
- 期：Complete
- 页码：98-103
- 文件大小：529 K
摘要
Phosphate glasses, having composition 50BaO-xV2O5-(50-x)P2O5, (0 猢?#xA0;x 猢?#xA0;40 mol%), were prepared and characterized. The substitution of the P2O5 by V2O5 up to 10 mol%, in the binary 50BaO-50P2O5 glass entrained an increasing on Tg; beyond this value a reverse trend was observed. However, spectroscopic investigations revealed a phosphate glass system depolymerisation by systematic conversion of metaphosphate chains PO3鈭?/sup> into pyrophosphate P2O74鈭?/sup> and into orthophosphate PO43鈭?/sup>. Indeed, Above 10 mol%V2O5 content, the system was highly depolymerized due to the formation of isolated PO43鈭?/sup> structural units, resulting in poor cross-linking, making the glass system less rigid.
The mild steel corrosion inhibition in 1 M HCl by phosphate glass was investigated using electrochemical measurements. The results showed that these glasses act as a corrosion inhibitor in acidic medium and their inhibition efficiencies depend to the V2O5 content in the system. In addition, it is observed that the metaphosphate chains provided a better protection than pyrophosphate P2O74鈭?/sup> and orthophosphate PO43鈭?/sup>.