Vapor phase cleaning

Air Entrapment of Overspray U.S. Patent 5,690,740. Nov. 25, 1997 W.C. Smith, Potomac, Md. An air chisel apparatus for containing overspray associated with the spraying of a work surface.

ter; and inserting the stainless steel into the pickling bath wherein the redox potential is monitored and maintained between +100 and +350 mV.

Vapor Phase Cleaning

U.S. Patent5,690,750. Nov. 25, 1997 M. Inada et al., assignors to KK Toshiba, Kawasaki, Japan

articles in the vapor phase of an organic solvent having a flash point of 40 to IO0°C comprising feeding solvent vapor into a cleaning chamber, wherein an absolute pressure of 200 mbar or less is maintained and cleaning at a temperature at or above the flash point of the organic solvent and a pressure of 200 mbar or less.

A method of cleaning a metal, electronic, semiconductor, ceramic, glass, plastic, optical or surface-treated part comprising the step of cleaning the part in an immersion bath with a cleaning agent consisting essentially of an inflammable solveto ~diet:Xe~h"~rom "~negrotfo z:omd~s'/m-~di hydrocarbons and silicones, wherein the c}eafft~g is carried ot~t "m an a~mosphere of an inactive vapor resulting from thermal vaporization of perfluorocarbon, such that the inactive vapor condenses on the part,

P i c k l i n g S t a i n l e s s Steel U.S. Patent 5,690,748. Nov. 25, 1997 D. Henriet, assignor to UgineAciers de Chatillon et Gueugnon, Gueugnon,France A process for pickling a stainless steel

prro~auCt comoftgm~ a fid~im~'oatn'na~n~ a redox potential and consisting essentially o f FtF kt an amount of 6~) g/L.. to 150gt%: dissolved Fe 3÷ ions as the pickling agent; at least one oxidizing agent selected from the group consisting of ozone, chlorine, water

U.S. Patent5,690,751.Nov. 25, 1997 P. H6 et aL, assignors to The Dow Chemical Co., Midland, Mich. and EMO Obefflachentechnik GmbH, Bretten-Golshausen,Germany

Gm'vanezeo" Co=d-Rot'fed ~"lteet Sheet u s Patent 5,690,755 Nov 25, 1997 N Yoshinagaeta/, assignors to Nippon Steel Corp., Fo~yo

permanganates, peroxyurea, percarbonic acid, -pen~,r,"c~ ~,ccid, "pef'~zo'c~ ~c?g, T~,sulfuric acid, perphosphoric acid, periodic

point of the perfluorocarbon, forms a miswherein the blend washes off the surface of

vanized cold-rolled steel sheet having ex-

ate, and magnesium percarbonate; and wa-

part.

properties at room temperature.

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