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The corrosion inhibitive action of tetra butyl phosphonium hydroxide (TBPH) on mild steel was investigated in 0.5M H2SO4. On adding the potassium iodide (KI) to the solution corrosion inhibition efficiency was significantly improved. The inhibitive action of TBPH was investigated at various inhibitor concentrations and at various temperatures; however, a synergistic improvement in the performance...
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