Print ISSN: 1681-6900

Online ISSN: 2412-0758

Author : A. Abd Alameer, Nervana

Studying The Effect of Copper And Zinc Ions on The Corrosion Rate of Carbon Steel

Nervana A. Abd Alameer

Engineering and Technology Journal, 2010, Volume 28, Issue 4, Pages 730-742

An experimental work was performed to study the effect of Zn, Cu ions on
the corrosion rate of carbon steel in distilled and tap water solution containing, 25
& 50 ppm concentration of Zn, Cu ions at pH range 4, 6 &8 in distilled water and
at pH8 in tap water at room temperature under both static for 10 weeks and 1, 2,
6 &12 hours with dynamic conditions. The obtained results showed that the
corrosion rate was increased in the presence of 50 ppm of Cu ions in tap water
(2.326 mpy) after 10 weeks, under static conditions, whereas under dynamic
conditions, it was reached (10.511 mpy), the presence of fine suspended solid
particles in the solutions may also cause an increase in corrosion rate due to their
movement over the carbon steel surface .In contrast, the presence Zn ions in
solution as sacrificial anode, therefore, the corrosion rate was 2.24 times less than
that in presence of Cu ions, at the same conditions. In distilled water, the
corrosion rates were decreasing slightly with adding Zinc and copper ions
comparing to absence of metals ions in solution except at pH4 in the presence
50ppm of Cu ions may be accounted due to the increasing in the conductivity of
the solution, under static conditions. At 25ppm of Zn ions lowering in corrosion
rate may be explained that the Zn ions were protected carbon steel surface by
sacrificial. In the absence of Zn, Cu ions were also carried out.