采用旋转挂片法研究了缓蚀阻垢剂WJF-6在模拟海水循环冷水中对N80钢的缓蚀情况, 并利用极化曲线、线性极化等电化学方法研究了该缓蚀剂的缓蚀机理, 用静态阻垢法对该缓蚀剂的阻垢性能进行了研究, 分别研究了海水浓缩倍数为1、2和3时, 缓蚀阻垢剂WJF-6在模拟海水循环冷水中腐蚀与结垢的影响。结果表明, 采用0.3 m/s线速度旋转72 h、50 ℃, 浓缩倍数为3倍、模拟海水循环水、缓蚀阻垢剂WJF-6用量为75 mg/L时, 缓蚀率为91.8%。线性极化试验表明, 添加75 mg/L WJF-6后极化电阻大大增加, 缓蚀率为81.3%。缓蚀阻垢剂WJF-6的缓蚀作用主要是抑制了电极反应的阳极过程。浓缩倍数对缓蚀阻垢剂WJF-6在模拟海水循环冷水中腐蚀与结垢影响的研究结果表明, 当海水浓缩倍数超过3时, 腐蚀速率远小于国家标准规定的0.125 mm/a, 并且阻垢率超过90％。

The inhibition effect of corrosion and scale inhibitor WJF-6 on Q235 steel in simulated seawater circulation cooling water was studied by rotary coupon corrosion tests. The corrosion mechanism of the inhibitor was investigated by electrochemical methods such as polarization curve and linear polarization. The scale inhibition performance of the inhibitor was studied by static antiscale method. The influence of seawater concentration ratio on corrosion and scale inhibitor WJF-6 in simulated seawater circulation cooling water was tested. The results showed that the corrosion inhibition efficiency was 91.8% by non-pass air weight loss test with four parallel samples, linear velocity of 0.3 m/s, and rotation of 72 h at 50 ℃ when the concentration ratio of seawatewr was three times. The results of linear polarization showed that the polarization resistance greatly increased by adding 75mg/L corrosion and scale inhibitor WJF-6 with an inhibition efficiency of 81.3%. The corrosion inhibition of the corrosion and scale inhibitor WJF-6 is to restrain the anodic process of electrode reaction. The corrosion rate was lower than 0.125 mm/a and scale inhibition rate was more than 90% when the concentration ratio of seawater.