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This paper was studied on corrosion-erosion behavior of heat exchanger tube for gas absorption refrigeration machine. In the tap water at 30 ℃. anodic polarization test of copper and aluminium brass tube was carried out. And cavitation erosion-corrosion behavior of heat exchanger tube for gas absorption refrigeration machine were considered. The main results are as following:<br/> In the low anodic potential region, the corrosion current density of A1-brass is higher than that of Cu, but that of AI-brass is controlled than Cu over 350 m V /SCE from open circuit potential. The weight loss of copper by cavitation erosion-corrosion is higher than that of AI-brass. The pit growth behavior of copper by cavitation erosion-corrosion changes from shallow pit type to undercut pit type with time pass mg.<br/>
This paper was studied on effect of environment on corrosion of heat exchanger tube for gas absorption refrigeration systems. Under the various of solution temperature and LiBr concentration, electrochemical polarization test of 10% cupronickel, 30% cupronickel, Al-brass tube was carried out. The polarization resistance behavior of tubes according to LiBr concentration considered. The polarization behavior of tubes according to LiBr concentration and temperature were observed. The main results are as following: As LiBr solution concentration increases, the polarization resistance of AI-brass tube deceases. However, the polarization resistance of cupronicekl in 40% LiBr is higher than in 60% LiBr. Anodic polarization behavior of 30% cupronickel according to LiBr addition shows active-passive transition behavior. In overall concentration region, the corrosion current density of cupronickel is controlled than that of Al-brass.<br/> <br/>
The corrosion rate, accelerative factor by corrosion fatigue, stress corrosion cracking behavior and characteristic of corrosion protection for weldment of SB41 used for steel fishing bank in seawater were investigated at both laboratory and coast. The main results obtained are as the following : 1) The penetration rate of base metal(BM) and heat affected zone(HAZ) is about 0.36-0. 55㎜/y in seawater of coast. 2) The accelerative factor a of BM and HAZ by the corrosion fatigue in seawater is about 1.6-2.5 and α of HAZ is more susceptible than that of BM under the low region of stress intensity factor range(△K). 3) The stress corrosion cracking of weldment in seawater can be controlled by the Alalloy sacrificial anode(protection potential : -1100mV/SCE).