Application and Research on Corrosion and Scale Inhibitor WJF-6 in Seawater Circulation Cooling Water
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. And corrosion mechanism of this inhibitor was researched by some electrochemical measurements such as polarized curves and linear polarization, scale inhibition performance of this inhibitor was studied by static anti-scale method. At the same time, the corrosion and scaling influence of concentrated 1,2,3times for corrosion and scale inhibitor WJF-6, used in simulated seawater circulation cooling water, was researched. The results showed that the corrosion inhibitor efficiency reached 91.8% with 75mg/L of the inhibitor with linear velocity of 0.3m/s, and rotation of 72h at 50°C when concentrated multiple was three times. The results of linear polarization showed polarized resistance greatly increase by adding 75mg/L of this kind of inhibitor, its inhibition rate achieved 81.3%. The results of polarized curve revealed the strong polarized area of polarized curve have left shift and anodic polarized curves of electrode reaction was increased in strong polarized area, the basic function of corrosion and scale inhibitor WJF-6 is that the anodic process of electrode reaction were restrained. The effect of concentration multiple on corrosion and scale inhibitor WJF-6 in simulated seawater circulation cooling water showed that the corrosion rate was less than 0.125mm/a of the national standard and when concentrated multiple of simulated seawater circulation cooling water exceeded three times, and scale inhibition rate was more than 90%.
Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang
Y. Z. Zhou et al., "Application and Research on Corrosion and Scale Inhibitor WJF-6 in Seawater Circulation Cooling Water", Advanced Materials Research, Vols. 189-193, pp. 3288-3291, 2011