PENGARUH BEBAN TERHADAP LAJU KOROSI PADA STRINGER ALUMINIUM 7075-T6

FAJAR RAMONA, MUHAMMAD (2018) PENGARUH BEBAN TERHADAP LAJU KOROSI PADA STRINGER ALUMINIUM 7075-T6. Skripsi thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

A stringer is a thin strip material fastened on the plane’s skin which functions to transfer aerodynamic weight that works on the skin to the frame. It usually does not attach to anything except the skin where the a part of the plane’s flexible moment flows through axial weight. In corrosion cases on fuselage L/H 27 and FS 947 a stringer is located right under the cargo, where that position is susceptible towards breakdown due to the pressure received, wet and humid condition making a damage towards the stringer in the form of corrosion, crack and other. Therefore, research and testing on the effect of weight to the corrosion are required to identify the value of weight effect to the corrosion on the stringer. The material used was aluminium 7075-T6. The material was cut in the width of 1,3 cm and length of 15 cm and was given a variety of pull force for 6000 N, 6500 N and 7000 N and a micro structure test and corrosion velocity test were done on a speciment with a diameter of 1,2 cm. Based on the data, it was identified that there was an increase in hardness due to the strain hardening which occured on 6000 N weight and 6500 N weight . On the 7000 N weight the corrosion value was 1,160 mpy. In conclusion, the greater the strain, the higher the corrosion velocity occured.

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