Ca2+-exchange in layered zirconium orthophosphate, α-ZrP: Chemical study and potential application for zinc corrosion inhibition
Source abstract
Abstract
Abstract The control of the corrosion phenomenon occurring at the metal interface requires the development of new non-toxic anticorrosion additives. For this purpose, zirconium orthophosphate compounds (Zr(HPO 4 ) 2 ,H 2 O noted α-ZrP) were synthesized by both hydrothermal and refluxing methods The Ca 2+ -cationic exchange in the layered structure is kinetically favoured by low crystallinity of α-ZrP synthesized by refluxing process, and leads to the formation of CaZr(PO 4 ) 2 ,4H 2 O, noted Ca 2+ -ZrP. The H + /Ca 2+ exchange mechanism is mainly triggered by acid-base considerations, and especially the pKa of α-ZrP/Ca 2+ -ZrP acid-base couple (evaluated to 2.5). Both compounds are acidic compounds by internal exchangeable H+ for α-ZrP and surface protons for Ca 2+ -ZrP, and can be used as potential inhibitors of zinc corrosion. Electrochemical measurements show that Ca 2+ -ZrP compounds dispersed in the NaCl electrolyte buffer the pH value over a long time and therefore allow controlling the corrosion rate of zinc.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Chemical Synthesis and Characterization · Radioactive element chemistry and processing · Corrosion Behavior and Inhibition
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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