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 |