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Tersedia di Perpustakaan Utama UIN Mahmud Yunus Batusangkar
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Underground corrosion may cause serious damage to the underground steel pipelines structure. Cathodic protection (CP) method is the most important in order to prevent underground corrosion. In this project, Cathodic Protection by using sacrificial anodes technique will be used to the underground steel pipeline. In this project a study of the performance of magnesium and zinc anodes have been carried out. Besides that, in order to know the effect of coating to the corrosion rate, the specimens of steel pipe have been coats using paint. All of the specimens were buried in the soil with depth 0.2m, pH 5.49. Each sample undergoes underground exposure for 28 days before the surface morphology investigation was conducted using Scanning Electron Microscope (SEM). After the exposure period, cleaning process for all specimens follows prior to the final analysis. Corrosion rates were calculated using weight loss methods for all of the specimens. Magnesium sacrificial anode gives better protection to the steel pipe compare to the zinc anode. The result of the corrosion rate for cathodically protected coated steel pipe by using magnesium anode was lowest which is 0.80 mpy compared to the cathodically protected coated steel pipe with sacrificial zinc anode, the corrosion rate is 2.32 mpy. The result for coated steel pipe without using any anode is 2.71 mpy. The magnesium anode performance yield similar result to the cathodicaly protected for uncoated steel pipe. The corrosion rate for coated steel pipe is around 0.80 mpy to 2.71 mpy which is lowest compare to corrosion rate for uncoated steel pipe is around 9.86 mpy to 15.68 mpy. Surface morphology examinations indicate the type of corrosion occurred on the steel pipe was uniform corrosion and galvanic corrosion. In conclusion, the conjoint use of cathodic protection and coating takes advantage of the most attractive features of each method of corrosion control. Magnesium anodes proves to be more practical anode in applying Cathodic Protection for underground steel pipelines.
Underground corrosion may cause serious damage to the underground steel pipelines structure.
The effect of loading oil palm trunk as filler in natural rubber was investigated in this research. The testing that will be made on the reinforced fiber rubber are tensile strength test and swelling test. The natural rubber is obtained from Rubber Research Institute Malaysia (RRIM). There are three types of rubber in this research. They are Epoxied Natural Rubber (ENR), Standard Malaysian Rubber (SMR), and Styrene-Butadiene Rubber (SBR). The selected ENR will be milled on the two roll mill machine and mix with filler after the milling process. The filler will be divided into five different of parts per hundred rubbers (phr). The compounds will be vulcanized with sulfur and ready to be molded. The molded rubber will be tested. The machines that will be used in this research are two roll mill for compounding and hot press machine for molding. Two roll mills will operate for 3 hours per compound. The hot press machine will be used for 25 minutes each molding sessions. Conventional filler is the carbon black filler. Oil palm trunk is used as filler to compare with carbon black filler in terms of rubber properties. It was found out that the higher the amount of oil palm trunk in rubber, the lower the tensile strength of the rubber. The swelling of rubber product is higher in kerosene compare with diesel. When the filler content increase, the mixing time will be increased.
The effect of loading oil palm trunk as filler in natural rubber was investigated in this research.
