Patent application number | Description | Published |
20090011277 | METAL-COATED STEEL STRIP - A steel strip having a metal coating on at least one surface of the strip is disclosed. The strip is characterised in that the coating includes aluminium-zinc-silicon alloy that contains magnesium and the coating has small size spangles. | 01-08-2009 |
20090199934 | TREATING AL/ZN-BASED ALLOY COATED PRODUCTS - A method of treating an Al/Zn-based alloy coated product that includes an Al/Zn-based alloy coating on a substrate is disclosed. The method includes the steps of rapid intense heating of the alloy coating for a very short duration, and rapid cooling of the alloy coating, and forming a modified crystalline microstructure of the alloy coating. | 08-13-2009 |
20090269611 | METAL-COATED STEEL STRIP - A steel strip having a coating of a metal alloy on at least one surface of the strip is disclosed. The metal alloy contains aluminium, zinc, silicon, and magnesium as the major elements. The metal alloy also contains strontium and/or calcium and unavoidable impurities and optionally other elements that are present as deliberate alloying elements. The concentration of magnesium is at least 1 wt. % and the concentration of (i) strontium or (ii) calcium or (iii) strontium and calcium is greater than 50 ppm. | 10-29-2009 |
20100021760 | METAL-COATED STEEL STRIP - A steel strip having a coating of an aluminium-zinc-silicon alloy on at least one surface of the strip is disclosed. The strip is characterised in that the aluminium-zinc-silicon alloy contains less than 1.2 wt. % silicon and also contains magnesium. A method of forming a coating of an aluminium-zinc-silicon alloy on a steel strip is also disclosed. The method includes moving steel strip upwardly through a coating pot containing a bath of an aluminium-zinc-silicon alloy and having an opening in a bottom wall of the pot and forming a coating of the alloy on the strip. The method is characterized by minimizing residence time of steel strip in contact with the aluminium-zinc-silicon alloy bath in the pot. | 01-28-2010 |
20100266866 | METHOD OF METAL COATING AND COATING PRODUCED THEREBY - A method for coating a metal substrate, such as a steel strip, is disclosed. The method comprises vapour or electro-depositing an alloy control material, as described herein, onto the substrate and passing the substrate through a bath of molten coating material and forming a coating of the coating material onto the deposited alloy control material. | 10-21-2010 |
20110027613 | METAL-COATED STEEL STRIP - An Al—Zn—Si—Mg alloy coated strip that has Mg | 02-03-2011 |
20110052936 | METAL-COATED STEEL STRIP - An Al—Zn—Si—Mg alloy coated strip that has Mg | 03-03-2011 |
20120088115 | CORROSION PROTECTION WITH AL / ZN-BASED COATINGS - Red rust staining of Al/Zn coated steel strip in “acid rain” or “polluted” environments can be minimised by forming the coating as an Al—Zn—Si—Mg alloy coating with an OT:SDAS ratio greater than a value of 0.5:1, where OT is the overlay thickness on a surface of the strip and SDAS is the measure of the secondary dendrite arm spacing for the Al-rich alpha phase dendrites in the coating. Red rust staining in “acid rain” or “polluted” environments and corrosion at cut edges in marine environments can be minimised in Al—Zn—Si—Mg alloy coatings on steel strip by selection of the composition (principally Mg and Si) and solidification control (principally by cooling rate) and forming Mg | 04-12-2012 |
Patent application number | Description | Published |
20110129344 | SLURRY PUMP IMPELLER - A slurry pump impeller which includes a front shroud and a back shroud each having an inner main face with an outer peripheral edge and a central axis, a plurality of pumping vanes extending between the inner main faces of the shrouds, the pumping vanes being disposed in spaced apart relation. Each pumping vane includes a leading edge in the region of the central axis and a trailing edge in the region of the outer peripheral edges of the shrouds with a passageway between adjacent pumping vanes. Each passageway has associated therewith a discharge guide vane, each discharge guide vane being disposed within a respective passageway and located closer to one or the other of the pumping vanes and projecting from the inner main face of at least one of the or each shrouds. | 06-02-2011 |
20110142610 | PUMP CASING - A pump casing for a centrifugal pump, which comprises an inlet opening, a discharge outlet, and a transition surface extending between an inner peripheral surface of the main pumping chamber and an inner peripheral surface of the discharge outlet, the transition surface arranged for separating an in use exit flow of material in the discharge outlet from an in use recircula tion flow of material in the main pumping chamber. The transition surface has a cutwater having a profiled section which comprises a protrusion which extends irregularly from an otherwise generally rounded arched or U-shaped transition surface and is configured such that, in use, the velocity and/or turbulence resulting from the in use flow of the material being pumped in the main pumping chamber is reduced. | 06-16-2011 |
20110158795 | CENTRIFUGAL PUMP IMPELLERS - A centrifugal pump impeller includes front and back shrouds and a plurality of pumping vanes therebetween, each pumping vane having a leading edge in the region of an impeller inlet and a trailing edge, the front shroud has an arcuate inner face in the region of the impeller inlet, the arcuate inner face having a radius of curvature (R | 06-30-2011 |