摘要
研究了除氧剂乙醛肟 (AO)在水中形成溶液的质量浓度、温度、pH值对水中除氧和对A3钢电极电化学性能的影响。对比了用氨水 (NH3·H2 O)和氢氧化钠 (NaOH)作pH值调节剂 ,乙醛肟溶液对A3钢电极电化学行为的作用 ;比较了乙醛肟 (AO)、联氨 (N2 H4)和对苯二酚 (HQ)三种除氧剂对A3钢电极的钝化作用 ,次序为 :AO >HQ >N2 H4。结果表明 ,当 ρ(乙醛肟 ) =175 .0mg L ,水中氧含量达到最低〔ρ(O2 ) =3.4mg L〕。当温度为 75～ 90℃时 ,乙醛肟能够与氧快速反应。当 ρ(AO)=5 0 .0mg L、pH 11.0时 ,A3钢电极腐蚀电流密度jcorr=4.5 81μA cm2 ,钝化性能较好。
Deoxidization of acetaldoxime(AO) and its electrochemical behaviour towards A3 electrode were studied under various concentrations,temperatures and pH values of AO solution.The effects of NH\-3·H\-2O and NaOH as pH regulating agents and AO,N\-2H\-4 and HQ as deoxidizers on electrochemical properties of AO solution towards A3 electrode were investigated and compared.It was found that the rate of chemical reaction between AO and oxygen was accelerated when the temperature was 75-90 ℃.When the concentration of AO solution was 175.0 mg/L,the concentration of oxygen in water could be as low as 3.4 mg/L.Passivation effect was obvious in solution of pH11.0 and ρ (AO)=50.0 mg/L.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2000年第11期643-645,675,共4页
Fine Chemicals
