The conventional weight-loss tests and the electrochemical techniques were used to study the
inhibition action of four inhibitors for
copper in boiling deaerated 60%LiBr solution.It indicated that the corrosion rate of copper was decreased when
LiOH,Na 2MoO 4 or BTA was added to the solution either individual or in different
combination.The inhibition
effect of combination was better than that of individual for LiOH not only benefited
forming passive film but also accelerated the reaction of CuBTA and reduction products such as MoO 2 participated in forming passive film.The optimal proportioning was added 0.10 mol/L LiOH,150 mg/L Na 2MoO 4 and 100 mg/L BTA to LiBr solution and the corrosion rate of copper was decreased to 39.52 μm/a.LiNO 3 had little effect in inhibiting the dissolution of copper for the following reasons.The diffusion velocity of NO - 3 was slower than the others.NO - 3 enhanced the tendency of pitting and its reducing reaction was restrained by LiOH.The order of inhibition effect was LiOH>BTA>Na 2MoO 4>LiNO 3.
More summaries about the RESEARCH ON SYNERGETIC EFFECT OF FOUR INHIBITORS ON COPPER IN 60%LiBr SOLUTION