| 摘要 |
To prevent with certainty corrosion by mercury even in nonoperating of plant facilities, plate fins 1 and flat plates 2 of flow passage members constituting cooled fluid passages and refrigerant passages are formed by an aluminum alloy and on surfaces of the plate fins 1 and the flat plates 2, an oxide film formed by a reaction between the aluminum alloy and an oxidizing component in an oxidizing gas is formed, or a hydroxide film formed by a reaction between the aluminum alloy and an alkaline component in an alkaline aqueous solution is formed.
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