Abstract A study on the acidic pyrophosphate dehydrate (NH4)2Zn(H2P2O7)2.2H2O, has been reperformed in order to investigate its thermal and electrochemical behavior. The results of thermal analysis (TGA-DTA), X-ray diffraction and infrared spectra showed that (NH4)2Zn(H2P2O7)2.2H2O decomposes into an amorphous phase at 460 °C, then around 910 °C, the appearance of another crystalline phase is found. X-ray diffraction and infrared spectra have shown that it is the cyclotetraphosphate Zn2P4O12. The corrosion protection efficiency of (NH4)2Zn(H2P2O7)2.2H2O using electrochemical measurements is also discussed in this paper. The satisfactory results confirm that this compound can be a good inhibitor of corrosion of mild steel in an acid medium. Graphical Abstract

中文翻译：

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酸性焦磷酸盐 (NH4)2Zn(H2P2O7)2.2H2O 的热和电化学行为

摘要 对酸性焦磷酸脱水物 (NH4)2Zn(H2P2O7)2.2H2O 进行了研究，以研究其热和电化学行为。热分析（TGA-DTA）、X射线衍射和红外光谱结果表明，(NH4)2Zn(H2P2O7)2.2H2O在460°C分解为非晶相，然后在910°C左右，出现另一种结晶相找到。X 射线衍射和红外光谱表明它是环四磷酸盐 Zn2P4O12。本文还讨论了使用电化学测量的 (NH4)2Zn(H2P2O7)2.2H2O 的腐蚀保护效率。令人满意的结果证实，该化合物在酸性介质中可以很好地抑制低碳钢的腐蚀。图形概要