摘要:
Disclosed are Cr-free composition for treating metal surface comprising (a) a hydroxyl group-containing organic resin, (b) a phosphoric acid and (c) at least one of ions and compounds of at least one metal selected from the group consisting of Cu, Co, Fe, Mn, Sn, V, Mg, Ba, Al, Ca, Sr, Nb, Y and Zn, and optionally (d) at least one of colloids (sol) or powders of SiO 2 , SnO 2 , Cr 2 O 3 , Fe 2 O 3 , Fe 3 O 4 , MgO, ZrO 2 , Al 2 O 3 and Sb 2 O 5 ; as well as a metal sheet or metal article having thereon (i) a coating film of the Cr-free composition and optionally (ii) a coating film of a coating composition comprising an organic resin and if desired a colloid (sol) or a powder.
摘要:
This invention provides a film treating agent for an electrical steel sheet having excellent film characteristics such as high space factor, punchability, weldability, adhesion, etc., and having excellent lubricating property after stress relief annealing, and a production method for a non-oriented electrical steel sheet using the film treating agent. The film treating agent comprises, as principal components thereof, 100 parts by weight, calculated in terms of the solid, of at least one member selected from the group consisting of aluminum phosphate, calcium phosphate and zinc phosphate as an inorganic material, and 1 to 300 parts by weight of a coarse grain emulsion resin having a grain size of 0.3 to 3.0 µm as an organic material.
摘要:
An improved anticorrosion coating composition is disclosed. The composition is characterized in that in the known anticorrosion coating composition comprising a chromic acid compound or a chromic acid compound and a boric acid compound, a powder of zinc, aluminum of an alloy of a mixture thereof, a (poly)glycol compound and solvent, a part of chromic acid compound ingredient is replaced by a water-soluble nickel and/or cobalt compound. The composition exhibits a better corrosion protection performance in more severe corrosion environment than the known anticorrosion coating composition with lesser content of harmful hexavalent chromium.
摘要:
Die Erfindung betrifft ein Bauteil aus einer Titanlegierung mit einer Schutzschicht (2,3,5), die sich im wesentlichen aus einer oxydationsbeständigen und diffusionshemmenden Grundschicht (2), einer titanfeuerhemmenden Mittelschicht (3) und einer passivierenden Deckschicht (4) zusammensetzt und gibt ein Verfahren zur Herstellung der Schutzschicht an.
摘要:
This invention is directed to improved magnesium oxide slurries for use in coating silicon steels prior to high temperature annealing, comprising a calcination-modified magnesium oxide and water. Inorganic salts of barium, chromium, silicon, zinc or aluminum are added to magnesium hydroxide prior to calcination, resulting in a calcined magnesium oxide product having improved properties. This invention is also directed to an improved process for coating silicon steel, using the above described improved magnesium oxide product.