| 摘要 |
<p>A system and process for chemical milling or cleaning a surface portion (103) and/or surface deposit (12, 52, 220) from metal products (14, 54, 100, 202), such as chemically milling a metal member (14, 54, 100, 202) to remove surface defects and/or cleaning non-metallic deposits from a metal surface (13, 53, 102, 210) and a system and process for cleaning a hollow interior or a passageway (206) of a metal member (202), the system and method including associating the metal product (14, 54, 100, 202) with an electrolyte (18, 58, 120, 230), such as a diluted acid mixture. A counter electrode (26, 66, 88, 125, 240) having a higher potential than the metal of the metal product (14, 54, 100, 202) is also associated with the electrolyte (18, 58, 120, 230). The counter electrode (26, 66, 88, 125, 240) is dc coupled to the metal product (14, 54, 100, 202), such that electric current flows from the metal to the counter electrode (26, 66, 88, 125, 240) due to the difference in the natural potentials of the metal and the counter electrode (26, 66, 88, 125, 240). The surface portion (103) and/or surface deposit (12, 52, 220) is thereby cleaned or milled from the metal product (14, 54, 100, 202). In an embodiment of a counter electrode (88, 240) particularly useful for cleaning and/or milling internal passageways (206) of metal members (202), an external container (90, 242) is provided having the counter electrode material (92, 250) therein, with the counter electrode material (92, 250) being dc coupled to the metal member (202), and electrolyte (18, 58, 120, 230) passing through the container to contact the counter electrode material (92, 250) and fluidicly coupled into the passageway (206) of the metal member (202) to clean same.</p> |
