Plate type heat exchanger and method for manufacture thereof
AssigneesBrazing Co., LTD., Fukuda Metal Foil & Power Co., Ltd.
InventorKaoru Tada
Life of this patent
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Abstract
A plate type heat exchanger wherein contacting portions of laminated plural plates and fins or contacting portions of laminated plural plates are brazed to form a heat exchange area, characterized in that at least the surface of a plate or fin contacting with a fluid is covered with an alloy comprising in weight ratio 25-35% of chromium, 5-7% of phosphorus, 3-5% of silicon, 0.001-0.1% of at least one selected from the group consisting of aluminum, calcium, yttrium and mischmetal, and balance containing mainly nickel. The alloy may contain 15% or less of iron and or 10% or less of molybdenum. The plate type exchanger exhibits enhanced pressure resistance and is excellent in corrosion resistance.
Claims4
A plate type heat exchanger wherein contacting portions of laminated plural plates and fins or contacting portions of laminated plural plates are brazed to form a heat exchange area, characterized in that at least the surface of a plate or fin contacting with a fluid is covered with an alloy comprising 25 to 35 wt. % of chromium, 5 to 7 wt. % of phosphorus, 3 to 5 wt. % of silicon, 0.001 to 0.1 wt. % of at least one selected from the group consisting of aluminum, calcium, yttrium and mischmetal, and balance containing mainly nickel.
Dependencies are inferred from the claim text.