ANALYSIS OF ACTIVATION CONTROLLED GALVANIC CORROSION

number: 
1249
English
Degree: 
Author: 
SHYMMA KADHEM Al-SHEMMERY
Supervisor: 
Prof. Dr.Qasim J. Slaiman.
year: 
2004

 The importance of corrosion studies is threefold. The first area of significance is economic including the objective of reducing material losses resulting from the corrosion of piping, tanks, metal components of machines,ships, bridges, marine structures, etc. The second area is improved safety of operating equipment, which through corrosion may fail with catastrophic consequences.Because of practical importance of protection of industrial equipments from galvanic corrosion, the need arises to study the effect of variables, such as hydrogen ion concentration, metallic ion concentration, symmetry factor (alpha) and area fraction of metals on galvanic corrosion in de-areated acidic media of several industrially important metals Fe, Zn, Cu. For these reason a computer program is developed. Which can be used for a general number or type of coupled metals with a range for hydrogen ion concentration (0.01- 1M), metallic ion concentration (10-6-10-2M), symmetry factor α=0.3,0.5,0.7 and area fraction (0.10.9) at ambient condition (T=25C and P=1 atm).This program can also be used for free corrosion of metals.The calculations in the new developed computer program are based on the well known equations of galvanic corrosion which are:-