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Corrosion in Ballast Tanks is the deterioration process where the surface of a ballast tank progresses from microblistering, to electroendosmotic blistering, and finally to cracking of the tank steel itself. ::“Effective corrosion control in segregated water ballast spaces is probably the single most important feature, next to the integrity of the initial design, in determining the ship’s effective life span and structural reliability,” as said by Germanischer Lloyd's Principal surveyor. Throughout the years the merchant fleet has become increasingly aware of the importance of avoiding corrosion in ballast tanks. == Factors with an influence on corrosion in ballast tanks == Epoxy and modified epoxy are standard coatings used to provide protective barriers to corrosion in ballast tanks. Exposed, unprotected steel will corrode much more rapidly than steel covered with this protective layer. Many ships also use sacrificial anodes or an impressed current for additional protection. Empty ballast tanks will corrode faster than areas fully immersed due to the thin - and electo conducting - moisture film covering them. The main factors influencing the rate of corrosion are diffusion, temperature, Conductivity, type of ions, pH, and electrochemical corrosion potential.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Corrosion in ballast tanks」の詳細全文を読む スポンサード リンク
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