It was conducted on Wednesday, 18/9/2024, in the Al-Khwarizmi Central Hall. the discussion of the master’s thesis of the student Abdul Hamied Ayad Abdul Hamied, which is tagged:
” Corrosion Study Of C35 Steel For The Hull Of Sea Ships Under Various Flow Conditions And Polypoxy Coating”.
The discussion committee consisted of names listed below:
1- Prof. Dr. Ali Hussein Mohammed (Chairman)
2- Asst. Prof. Dr Hamza Abdulrasool Hussain (Member)
3- Lecturer Dr. Ban Bakir Jawad (Member)
4- Prof. Dr. Abdullah Dhayea Assi (Supervisor)
This study examined the effect of corrosion and fatigue on the hulls of marine ships. DIN 1.0501 C35 steel is used in the construction of marine ship hulls in Basra port. Since this metal has high formability, it is widely used in ships. The corrosion resistance test was carried out in laboratory-prepared seawater under static and flowing conditions, at a flow rate of 1500 liters per hour by total-immersion method for samples coated with Polypoxy CR coat and for uncoated samples. The half-immersion method was used for samples with immersion periods of up to a month and a half. The temperature was kept constant at 30°C, and the salt concentration (3.5% NaCl) was kept constant. The corrosion rate of C35 carbon steel was calculated by using the weight loss method.
Accordingly, the thesis included recommendations including:
1- Increasing the flow rate led to an increase in the corrosion rate.
2- The resin coating had excellent efficiency, as it reduced the corrosion rate significantly compared to the uncoated samples.
3- A significant reduction in fatigue life for corroded fatigue samples subjected to the corrosion process for only 24 hours compared to pure fatigue samples.
4- The corrosion in the half-immersion test was the most severe and aggressive compared to the total-immersion test. Local corrosion spreads in the static state corrosion samples, while uniform corrosion spreads along the flow state corrosion samples.
After the scientific discussion by the members of the discussion committee, the researcher was awarded a Master’s degree in Mechanical Engineering.
