本研究實驗地點為台南四草野生動物保護區的魚塭水池（A、B、C、D池）及出入水口（I），實驗分為現地及實驗室兩部分。在現地放置304材質之不鏽鋼鍋進行一年的觀察，發現304材質的不鏽鋼腐蝕情形，有著季節性的變化。在春夏時，腐蝕的現象明顯並且有不同的腐蝕現象，腐蝕現象至少為三類（紅棕色物質的生成、黑色物質的生成、蝕刻現象的出現）；在秋冬時，腐蝕的現象不明顯或沒有腐蝕情形。在實驗室利用304材質之不鏽鋼棒進行腐蝕實驗，由野外實驗結果得知腐蝕的現象和鹽度有某種相關性，因此分別在五種不同鹽度（S1：7.4‰；S2：13.5‰；S3：17.2‰；S4：23.5‰；S5：36.6‰）下以硫酸還原培養基培養細菌，再各別放入不鏽鋼棒。在鹽度低時，腐蝕現象就顯著（重量減輕）或不同；在鹽度高時，腐蝕現象就不明顯或沒有腐蝕情形（重量增加）。實驗室結果顯示鹽度或許是一種不鏽鋼之腐蝕因素，而微生物又是另一種造成腐蝕的因素，另外，鹽度在較低範圍時，鹽度及微生物所造成的腐蝕最為嚴重，研究成果可以做為日後不鏽鋼防腐的參考依據。

The experimental sites of this study were in the aquacultural ponds (ponds A, B, C, and D) and the water inlet (I) of the Hsih-Tsao Wildlife Conservation Area, Tainan City. The on-site and laboratory experiments were carried out in this study. In the field, the 304-type stainless steel pans were placed one year in ponds A, B, C, and D and at the water inlet (I) for their corrosion observations. The results revealed that there existed a seasonal change in the corrosion of 304-type stainless steel. In spring and summer, the corrosion of the stainless steel was remarkable, revealing three different kinds of corrosion patterns (formation of red-brown matter, formation of black matter, and appearance of etching). In the laboratory, the experimental results of corrosion tests on the 304-type stainless steel coupon demonstrated that the corrosion was somewhat correlated with salinity. Thus, the bacteria isolated from the adhesives on the corroded stainless pans in ponds A, B, C, D and the water inlet were cultivated in the sulfate-reducing medium with five different salinities (S1: 7.4‰, S2: 13.5‰, S3: 17.2‰, S4: 23.5‰, S5: 36.6‰), in which the 304-type stainless steel coupon was put in separately. The results showed that the corrosion was marked (loss of weight) while the coupon was in the low salinity medium, whereas the corrosion was not significant while that was in the high salinity medium. This suggests that salinity and microbes can be causative factors of corrosion. In the low salinity medium, salinity and microbes could cause the most severe corrosion of stainless steel, suggesting being a good reference for the anti-corrosion of stainless steel.

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