Method for treating metal surfaces bycarboxylation
1
at a temperature not above 45°C and pH value less than 3.5 with an aqueous acidic alkali metal phos- phating solution or dispersion containing: At least one compound of at least one phosphorus containing acid and/or at least one of their derivates, like esters and salts, in a total content of all kinds of acids and all their derivates, like esters and salts, together less than 20 g/L calculated on mole base as orthophosphate, whereby the content of such phos- phorus containing compounds/ions is at least 50% by weight in comparison to all such compounds/ions and at least one ion selected from the group consist- ing of at least one alkali metal ion and ammonium ion, whereby the phosphating coating has a coating composition with a phosphorus content of not more than eight atomic % as measured by Secondary Neutral Mass Spectroscopy (SNMS), and whereby the phosphating coating has a coating weight in the range from 0.01 to 0.5 g/m 2. METHOD FOR TREATING METAL SURFACES BY CARBOXYLATION U.S. 2004118482 (Usinor Atofina) Derule, H.; Steinmetz, J.; et al. Method for treating a metal surface by carboxyla- tion before forming, said metal being selected from zinc, iron, aluminum, copper, lead, and the alloys thereof as well as copper-coated, aluminum-coated galvanized steels. The method is carried out in oxi- dizing conditions by bringing the metal into contact with an aqueous, organic, or hydro-organic bath comprising at least one organic acid in free form or in salt form. The method is characterized in that: The organic acid is a saturated or unsaturated aliphatic mono- carboxylic or dicarboxylic acid; the organic acid is in ~ Kushner Eiectroplating School - - - - . . - "Training Electroplaters Since 1947" WEBRING TRAININGTO YOU V' Focus on topics critical to your tasks V ~ industry recognized training materials v ~ No travel expenses or time away from your plant V p Training materials suitable for future reference Call, fax or e-mail for information and free quotation! 732 Glencoe Court, Sunnyvale, CA 94087 (408) 749-8652 • Fax (408) 749-0176 E-mail: [email protected] www.platingschool.com Circle 029 on reader information card or go to www.thru.to/webconnect solution and/or emulsion in the bath at a concentra- tion greater than 0.1 M; the pH of the bath is acid. PRDCESS FOR CORROSION PROTECTIDN OF TURBINE INTERNAL COMPONENTS U.S. 2004118341 Kunder, G.A.; Holden, J.E. Corrosion inhibitor is introduced as a fog, blown into the internal passages etc. ZINC-DIFFUSED ALLOY COATING FDR CORROSIDN/HEAT PROTECTION U.S. 6756134 (United Technologies Corp.) Bhatia, P.; Hanlon, TR.; et al. Zinc-diffused nickel alloy coating for corrosion and heat protection and method for forming such a coat- ing. The coating method broadly comprises the steps of forming a plain nickel or nickel alloy coating layer on a substrate, applying a layer of zinc over the nick- el or nickel alloy coating layer, and thermally diffusing the zinc into the nickel alloy coating layer. The coating method may further comprise immersing the coated substrate in a phosphated trivalent chromium conver- sion solution either before or after the diffusing step. The substrate may be a component used in a gas tur- bine engine, which is formed from a steel material. CUTTING TOOL U.S. 6756110 (Kyocera Corp.) Shibata, D. Tool has cemented carbide body with coating layer where reduction ratio of zirconium is smaller than that of other metals of Periodic Groups 4a, 5a, 6a. SURFACE TREATED STEEL MATERIAL, A METHOD FDR ITS MANUFACTURE, AND A CHEMICAL CDNVERSION TREATMENT MOULD US. 6756092 (Sumitomo Metal Ind.) Goto, K.; Izawa, M. Phosphate-based conversion coating for oil well steel pipes of 0.5 to 13% chromium alloy, with speci- fled potassium content. METHOD DF COATING SUBSTi~TE WITH THERMAl. SPRAYED METAL POWDER U.S. 6756083 (Hoeganaes AB) Hallen, H.; Holmqvist, U. Methods for applying thermal coatings on sub- strates using a diffusion alloyed metal powder are provided. The powder comprises pre-alloyed iron base powder particles having molybdenum particles diffusion alloyed to the base powder particles. Anselm Kuhn, E-mail, [email protected]. 58 www.metalfinishing.com
Transcript of Method for treating metal surfaces bycarboxylation
at a temperature not above 45°C and pH value less than 3.5 with an aqueous acidic alkali metal phos- phating solution or dispersion containing: At least one compound of at least one phosphorus containing acid and/or at least one of their derivates, like esters and salts, in a total content of all kinds of acids and all their derivates, like esters and salts, together less than 20 g/L calculated on mole base as orthophosphate, whereby the content of such phos- phorus containing compounds/ions is at least 50% by weight in comparison to all such compounds/ions and at least one ion selected from the group consist- ing of at least one alkali metal ion and ammonium ion, whereby the phosphating coating has a coating composition with a phosphorus content of not more than eight atomic % as measured by Secondary Neutra l Mass Spectroscopy (SNMS), and whereby the phosphating coating has a coating weight in the range from 0.01 to 0.5 g/m 2.
M E T H O D FOR TREATING METAL SURFACES BY
CARBOXYLATION
U.S. 2004118482 (Usinor Atofina) Derule, H.; Steinmetz, J.; et al. Method for t reat ing a metal surface by carboxyla- tion before forming, said metal being selected from zinc, iron, a luminum, copper, lead, and the alloys thereof as well as copper-coated, aluminum-coated galvanized steels. The method is carried out in oxi- dizing conditions by bringing the metal into contact wi th an aqueous, organic, or hydro-organic ba th comprising at least one organic acid in free form or in salt form.
The method is characterized in that: The organic acid is a sa tura ted or unsa tura ted aliphatic mono- carboxylic or dicarboxylic acid; the organic acid is in
~ Kushner Eiectroplating School - - - - . . -
"Training Electroplaters Since 1947"
WE BRING TRAINING TO YOU V' Focus on topics critical to your tasks
V ~ industry recognized training materials
v ~ No travel expenses or time away from your plant
V p Training materials suitable for future reference
Call, fax or e-mail for information and free quotation!
732 Glencoe Court, Sunnyvale, CA 94087 (408) 749-8652 • Fax (408) 749-0176
E-mail: [email protected] www.platingschool.com
Circle 029 on reader information card or go to www.thru.to/webconnect
solution and/or emulsion in the bath at a concentra- tion greater than 0.1 M; the pH of the bath is acid.
PRDCESS FOR CORROSION PROTECTIDN OF TURBINE
INTERNAL C O M P O N E N T S
U.S. 2004118341 Kunder, G.A.; Holden, J.E. Corrosion inhibitor is introduced as a fog, blown into the internal passages etc.
ZINC-DIFFUSED ALLOY COATING FDR
CORROSIDN/HEAT PROTECTION
U.S. 6756134 (United Technologies Corp.) Bhatia, P.; Hanlon, TR.; et al. Zinc-diffused nickel alloy coating for corrosion and heat protection and method for forming such a coat- ing. The coating method broadly comprises the steps of forming a plain nickel or nickel alloy coating layer on a substrate, applying a layer of zinc over the nick- el or nickel alloy coating layer, and thermally diffusing the zinc into the nickel alloy coating layer. The coating method may further comprise immersing the coated substrate in a phosphated trivalent chromium conver- sion solution either before or after the diffusing step. The substrate may be a component used in a gas tur- bine engine, which is formed from a steel material.
CUTTING TOOL
U.S. 6756110 (Kyocera Corp.) Shibata, D. Tool has cemented carbide body with coating layer where reduction ratio of zirconium is smaller than that of other metals of Periodic Groups 4a, 5a, 6a.
SURFACE TREATED STEEL MATERIAL, A METHOD FDR
ITS MANUFACTURE, A N D A CHEMICAL C D N V E R S I O N
TREATMENT MOULD
US. 6756092 (Sumitomo Metal Ind.) Goto, K.; Izawa, M. Phospha te -based conversion coating for oil well steel pipes of 0.5 to 13% chromium alloy, with speci- fled potassium content.
METHOD DF COATING SUBSTi~TE WITH THERMAl.
SPRAYED METAL POWDER
U.S. 6756083 (Hoeganaes AB) Hallen, H.; Holmqvist, U. Methods for applying thermal coatings on sub- strates using a diffusion alloyed metal powder are provided. The powder comprises pre-alloyed iron base powder particles having molybdenum particles diffusion alloyed to the base powder particles.
Anselm Kuhn, E-mail, [email protected].
58 www.metalfinishing.com
