Plate type heat exchanger and method for manufacture thereof
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United States of America Patent
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Feb 20, 2007
Grant Date -
Apr 15, 2004
app pub date -
Dec 6, 2001
filing date -
Dec 28, 2000
priority date (Note) -
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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.
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