摘要:
The present invention provides extruded tubes for heat exchangers having improved corrosion resistance when used alone and when part of a brazed heat exchanger assembly with compatible finstock. The tubes are formed from a first aluminum alloy containing 0.4 to 1.1% by weight manganese, up to 0.01% by weight copper, up to 0.05% by weight zinc, up to 0.2% by weight iron, up to 0.2% by weight silicon, up to 0.01% by weight nickel, up to 0.05% by weight titanium and the balance aluminum and incidental impurities. The fins are formed from a second aluminum alloy containing 0.9 to 1.5% by weight manganese or an alloy of the AA3003 type, this second aluminum alloy further containing at least 0.5% by weight zinc.
摘要:
The present invention provides extruded tubes for heat exchangers having improved corrosion resistance when used alone and when part of a brazed heat exchanger assembly with compatible finstock. The tubes are formed from a first aluminum alloy containing 0.4 to 1.1% by weight manganese, up to 0.01% by weight copper, up to 0.05% by weight zinc, up to 0.2% by weight iron, up to 0.2% by weight silicon, up to 0.01% by weight nickel, up to 0.05% by weight titanium and the balance aluminum and incidental impurities. The fins are formed from a second aluminum alloy containing 0.9 to 1.5% by weight manganese or an alloy of the AA3003 type, this second aluminum alloy further containing at least 0.5% by weight zinc.
摘要:
A fluid container and capsule therefor. The capsule comprises upper and lower parts, at least one of which has a dished formation and both of which have a peripheral rim, the rims being secured together so that the upper and lower parts are at least partially in register with one another to provide at least one vented chamber extending into the dished formation. The capsule includes a vent hole or like structure in at least one of the parts to communicate between the interior of the chamber and the exterior thereof. The lower part has its exterior so formed as to enable it to be held in stable engagement with a surface but so that a fluid may pass freely between those parts of the exterior of the lower part and the surface that are not in intimate engagement.
摘要:
An aluminum strip for a component, in particular a brazing component, in particular a tube or a disk, includes a profile having a brazing connection, wherein in at least one area, in particular in the area of the brazing connection: a first part of the strip thickness is taken up by a core layer of a first aluminum alloy; at least a second part of the strip thickness is taken up by at least one plating layer of a second aluminum alloy, wherein the first and the second aluminum alloy are configured to form a “brown band” layer during a brazing process; and at least a third part of the strip thickness is taken up by at least one “brown band” layer that is formed out of the first and the second aluminum alloy during the brazing process, and wherein a strip thickness of the aluminum strip is less than 500 μm and a thickness of the core layer and/or a thickness of the plating layer is configured such that after the brazing process at least 5% of the strip thickness that is taken up by the first aluminum alloy of the core layer still remains in the at least one area, and the “brown band” layer takes up more than 20% of the strip thickness, and the core layer is designed to be multi-layered with one, preferably central, main core layer and at least one side core layer.
摘要:
Processes are automatically allocated to processors in a processor array, and corresponding communications resources are assigned at compile time, using information provided by the programmer. The processing tasks in the array are therefore allocated in such a way that the resources required to communicate data between the different processors are guaranteed.
摘要:
An aluminum alloy containing (in wt. %): 0.2-0.5 Fe; 0.7-1.2 Si; 1.2-1.6 Mn; up to 0.3 Mg; up to 0.5 Cu; up to 0.2 Zn; up to 0.1 Ti is used to make the fins of heat exchangers particularly car radiators. The finstock has high post braze strength and thermal conductivity, and has a sufficiently electronegative potential as to be capable of acting as a sacrificial anode for the heat exchanger tubes. By virtue of the absence of Sn, In, and Cr, these heat exchangers can be scrapped and melted for re-use.
摘要:
An orange laked monoazo pigment has the following formula (I): wherein M is an alkaline metal selected from the group consisting of calcium, barium, strontium, magnesium and manganese.
摘要:
An aluminum strip for a component, in particular a brazing component, in particular a tube or a disk, includes a profile having a brazing connection, wherein in at least one area, in particular in the area of the brazing connection: a first part of the strip thickness is taken up by a core layer of a first aluminum alloy; at least a second part of the strip thickness is taken up by at least one plating layer of a second aluminum alloy, wherein the first and the second aluminum alloy are configured to form a “brown band” layer during a brazing process; and at least a third part of the strip thickness is taken up by at least one “brown band” layer that is formed out of the first and the second aluminum alloy during the brazing process, and wherein a strip thickness of the aluminum strip is less than 500 μm and a thickness of the core layer and/or a thickness of the plating layer is configured such that after the brazing process at least 5% of the strip thickness that is taken up by the first aluminum alloy of the core layer still remains in the at least one area, and the “brown band” layer takes up more than 20% of the strip thickness, and the core layer is designed to be multi-layered with one, preferably central, main core layer and at least one side core layer.
摘要:
Aluminum brazing alloy composition is (in wt. %): Mn 0.7-1.5, Cu 0.5-1.0, Fe not more than 0.4, Si not more than 0.15, Mg up to 0.8, V and/or Cr up to 0.3, Ti up to 0.1, others up to 0.05 each, 0.15 total, balance A1 of at least commercial purity. Improved properties include: post-brazed strength and sag resistance; corrosion resistance; ability to withstand interannealing and some homogenization.
摘要:
Aqueous heat transfer apparatus contains a multicomponent corrosion protection system including a first component adapted to release a corrosion inhibitor on exposure to water under relatively milder conditions and a second component adapted to release a corrosion inhibitor on exposure to water under relatively severer conditions. The components may be open top compartments of a capsule, closed by means of covers of controlled release glass which dissolve in water at different rates.