An apparatus for removing a coating from a substrate comprises a nozzle with an inner conduit having an orifice and an outer conduit coaxially arranged about the inner conduit and defining an annular opening between the inner and outer conduits. The nozzle is configured to direct a liquid stream through the orifice toward the coated surface and direct a gas flow through the annular opening such that the gas flow surrounds the liquid stream as the liquid stream moves towards the coated surface.

An object is to provide a lubrication treatment method of a metal wire rod, in which not a combination of acid washing/alkaline degreasing and phosphate/soap treatment each causing a large burden on the environment, but shot blast and a coat-type treatment agent are used to allow for a significant reduction in burden on the environment, and a batch manner is applied to allow for practical production efficiency and uniformly form a lubrication coating on a metal wire rod. The object is achieved by a lubrication treatment method of a metal wire rod, which is a method for lubrication treatment of a coiled metal wire rod in a batch manner, including a descaling step of performing shot blast treatment of a coiled metal wire rod, and a lubrication coating formation step of applying a lubricant to the metal wire rod after the descaling step, in which the coiled metal wire rod satisfies L/(dN)1.1 in the descaling step under the assumption that the coil width is L, the wire diameter of the metal wire rod is d, and the number of coil turns is N, and the lubricant contains one or more coating base components (A) selected from the group consisting of an inorganic salt and an organic acid salt, and a lubrication component (B).

A method for processing a workpiece, includes, a preparation step of providing a resist film with an opening on a processing surface of the workpiece, a processing step of removing a processing portion of the workpiece exposed by the opening while protecting a protection portion of the workpiece covered by the resist film provided on the workpiece, a measuring step of measuring an overall height from the processing portion of the workpiece to an upper surface of the resist film after the processing step, and a calculating step of calculating a processing amount of the workpiece based on the overall height measured and a thickness of the resist film after the processing step.

An apparatus for removing a coating from a substrate comprises a nozzle with an inner conduit having an orifice and an outer conduit coaxially arranged about the inner conduit and defining an annular opening between the inner and outer conduits. The nozzle is configured to direct a liquid stream through the orifice toward the coated surface and direct a gas flow through the annular opening such that the gas flow surrounds the liquid stream as the liquid stream moves towards the coated surface.

A method for media blasting a workpiece includes, during a scan cycle: accessing a first set of images captured by an optical sensor traversing a scan path over the workpiece; compiling the first set of images into a virtual model of the workpiece; accessing a first set of blast parameters; generating a first tool path for a first workpiece region of the workpiece based on a geometry of the workpiece represented in the virtual model and the first set of blast parameters. The method further includes, during a processing cycle: via the set of actuators, navigating the blast nozzle over the first workpiece region according to the first tool path; and projecting blasting media toward the workpiece according to the first set of blast parameters.

A surface treatment method includes a step of irradiating a workpiece with a pulsed laser beam through a transparent liquid and a step of causing particles to collide with a heat-affected layer developed on a surface layer portion of the workpiece in the step of irradiating. The particles each has a core made of an elastic body and abrasive grains provided on a surface of the core.

The method employs blast media containing a first grainy material, consisting mainly of a material with a hardness equal to or less than that of the target member to be restored in granular form. This blast media, along with gas, is ejected from a nozzle with a substantially rectangular-shaped outlet, while adjusting the flow rate. The ejected mixture functions as a graining tool to remove pollution, exposing underlying or surrounding surface to be restored of the target member without grinding away the surface and simultaneously providing a rough treatment to form fine texture on the restored surface.

A method of removing a coating system from a component that is coated with the coating system. The method involves: (a) immersing the component in a caustic solution; (b) maintaining the component in the caustic solution at atmospheric pressure for a time 1.5 hours at a temperature 150 C. and 250 C.; (c) removing the component; (d) rinsing the component in water; (e) water jet blasting the component to remove the ceramic top coat layer and any thermally-grown oxide; (f) immersing the component in an acid solution; (g) ultra-high pressure water jetting the component; (h) aluminising the component to convert any diffused Pt within the bond coat layer to PtAl; (i) acid stripping and grit blasting the component; (j) immersing the component in a solution of nitric acid and/or sulphamic acid; and (k) ultra-high pressure water jetting the component to remove any PtAl.

An apparatus to remove a coating from an edge of a substrate includes a vacuum chuck assembly and a nozzle assembly. The vacuum chuck assembly is configured to support the substrate using suction. The nozzle assembly includes a nozzle head with a pair of nozzle tips configured to direct an angled liquid stream on a surface of the substrate. An annular duct around each nozzle tip discharges a pressurized gas to form a gas shroud around the angled liquid stream.

A blasting abrasive and a method of use are provided. The blasting abrasive includes a ferrochrome slag having a composition of SiO.sub.2 in a range of from about 30 to 40 wt % (weight percent); Al.sub.2O.sub.3 in a range of from about 25 to 35 wt %; of Fe.sub.2O.sub.3, Cr.sub.2O.sub.3, or a combination thereof in a range of from about 10-20 wt %; MgO in a range of from about 15 to 25 wt %, by weight of the ferrochrome slag. The ferrochrome slag has a particle size in a range of from about 100 to 850 m (micrometers) with a particular size distribution.