Inhibition Effect of 1-Butyl-4-Methylpyridinium Tetrafluoroborate on the Corrosion of Copper in Phosphate Solutions

<table>The Van’t Hoff plots for the copper in 0.5 M <svg height="19.200001" id="M131" style="vertical-align:-4.18202pt" version="1.1" viewbox="0 0 33.700001 19.200001" width="33.700001" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,19.2)">
<g transform="translate(72,-56.64)">
<text transform="matrix(1,0,0,-1,-71.95,60.86)">
<tspan style="font-size: 12.50px; " x="0" y="0">P</tspan>
<tspan style="font-size: 12.50px; " x="6.9641709" y="0">O</tspan>
</text>
<text transform="matrix(1,0,0,-1,-55.96,66.03)">
<tspan style="font-size: 8.75px; " x="0" y="9.3400002">4</tspan>
<tspan style="font-size: 8.75px; " x="0" y="0">3</tspan>
<tspan style="font-size: 8.75px; " x="4.3759999" y="0">−</tspan>
</text>
</g>
</g>
</svg> solutions containing 10.0 mM of 1-Butyl-4-methylpyridinium tetrafluoroborate. The pH of solutions was as the following: (a) 2 and (b) 4.</table>

International Journal of Corrosion

fig9

Figure 9

Figure 9: Inhibition Effect of 1-Butyl-4-Methylpyridinium Tetrafluoroborate on the Corrosion of Copper in Phosphate Solutions 