Patent ID: 7736442

Claim:
A method for activating a surface of a member formed of metallic base material comprising the steps of: movably disposing a metallic member to be treated with respect to a fixed jetting head; disposing on a first portion of the jetting head an oxide-removing solution jetting guide for spraying an oxide-removing solution at an oxide-removing solution spraying pressure onto a surface of the member and disposing externally of the oxide solution jetting guide on the jetting head a first carbon dioxide jetting guide for spraying carbon dioxide at a carbon dioxide spraying pressure onto the surface of the member to be treated; disposing on a second portion of the jetting head a recovery guide and disposing externally of the recovery guide a second carbon dioxide jetting guide for spraying carbon dioxide at the carbon dioxide spraying pressure onto the surface of the member to be treated, wherein the recovery guide is capable of suctioning fats, oils, and oxides peeled-off from the member by spraying of the carbon dioxide at the carbon dioxide spraying pressure and spraying of the oxide-removing solution at the oxide-removing solution spraying pressure onto the surface of the member to be treated; moving the member relative to the jetting head in a direction from the first carbon dioxide jetting guide to the second carbon dioxide jetting guide; spraying the carbon dioxide at the carbon dioxide spraying pressure from the first carbon dioxide jetting guide onto an upstream portion of the surface of the member to be treated, wherein the portion sprayed is degreased and fats and oils are peeled off from the portion of said member; moving the member in a downstream direction that is in the direction of the second carbon dioxide jetting guide and spraying the degreased portion with the oxide-removing solution at the oxide-removing solution spraying pressure, wherein oxides are peeled off from the portion of said member; further moving the portion of said member in the downstream direction and suctioning said member with said recovery guide to recover the sprayed carbon dioxide, the sprayed oxide-removing solution, as well as the peeled off fats, oils, and oxides from said member; and moving the member still further in the downstream direction and spraying the portion of the member with carbon dioxide from the second carbon dioxide jetting guide to dry the portion of the metallic member to be treated.