Patent ID: 7829151
Filing Date: 2010-11-09
Classification: B23K,C23C

Abstract:
1. A process for producing surface-modified work pieces made from at least one of a metal and one or more alloys, comprising the steps of: providing the workpiece which is to be modified, wherein the workpiece to be modified is provided at a temperature of from 300 to 550° C., and after providing the workpiece at the temperature of from 300 to 550° C., treating the workpiece with at least one modifying agent to obtain the surface-modified workpiece, wherein the at least one modifying agent is at a temperature of at least 0° C. to at most 100° C., wherein the at least one modifying agent comprises a metal salt of an element from one of transition groups I to VI of the periodic table of elements and a compound of an element from groups V, VI, VII or VIII of the periodic table of elements, wherein the at least one modifying agent comprises a controlled atmosphere brazing (CAB) flux, wherein the metal salt is in an aqueous phase, the pH of which is between 3 and 10, wherein the treating step comprises contacting the workpiece with at least one modifying agent in aerosol and/or vapor form, and wherein the metal and one or more alloys is at least one of aluminum, magnesium, copper, an aluminum-based, a magnesium-based, and a copper-based alloy.