Abstract:
The invention concerns the conversion of light alloys.By lubricating the die with a vitreous substance based on alkaline phosphate and alkaline tetraborate, alloys based on aluminium or magnesium can be hot-drawn at speeds of at least 100 meters per minute and up to 300 meters per minute.The invention can be applied to drawing aluminium alloys, particularly those of series 2,000, 5,000 and 7,000.
Abstract:
A metallic surface is coated with a polymeric resinous coating by immersing the surface in an acidic aqueous coating composition comprising polymeric resinous coating-forming material and an oxidizing agent. The corrosion resistance and/or the surface appearance of the resinous coating is modified by rinsing the coating with an aqueous rinse solution containing hexavalent chromium or an aqueous rinse solution containing hexavalent chromium and reduced forms of chromium.
Abstract:
Acidic aqueous coating compositions containing an organic coating-forming material form coatings on metallic surfaces which are immersed therein. The thickness or weight of the coating formed by the coating composition is a function of the time the metallic surface is immersed in the composition. The resulting coatings have adhesion properties thereby providing an adherent base to which other coatings, for example, paint primers and/or final finish paints can be applied.
Abstract:
A tire and wheel assembly having a lubricant to enable it to be operated in a deflated condition without destructive heating in which one or more ingredients of the lubricant composition are enclosed in an enclosing means, the other ingredient or ingredients of the composition being placed in the inflation chamber of the assembly. The enclosing means release the first ingredient or ingredients into the inflation chamber, upon loss of inflation pressure, to form the composition.
Abstract:
An aqueous fluid for the working of metals comprising an aqueous solution of at least one salt of an amido acid of the formula: ##EQU1## in which R is a hydrocarbon group, substituted or not by chlorine, and having between 9 and 25 carbon atoms; n and n' are whole numbers or zero, identical or not, whose sum (n + n') is equal to 1 or 2.
Abstract:
A tire and wheel assembly having a lubricant to enable it to be operated in a deflated condition without destructive heating in which one or more ingredients of the lubricant composition are enclosed in an enclosing means, the other ingredient or ingredients of the composition being placed in the inflation chamber of the assembly. The enclosing means release the first ingredient or ingredients into the inflation chamber, upon loss of inflation pressure, to form the composition.
WHERE R1 and R2 are hydrogen or methyl; R3 and R4 are each an independently selected alkyl group having from 1 to 20 carbon atoms; R5 is the organic residue exclusive of reactive hydroxyl groups of a polyol, p is an integer of from 2 to 6 inclusive and n and m are positive integers independently selected in each chain and whose sum in each chain is from 2 to 20 are prepared by successively reacting boric acid with a glycol monoether and a polyol. These esters are useful as stabilizers and corrosion inhibitors for lubricants and non-aqueous hydraulic fluids.
Abstract:
The addition of a small amount of a soluble salt of perhalometallic or perhalometalloidic acid to an energytransmitting functional fluid sharply enhances the anti-erosion properties of the fluid.
Abstract:
This invention is based on a finding in which an addition of 10 - 30 wt percent of alloy powders to the solid lubricant of graphite-sodium fluoride or graphite-sodium fluoride-tungusten disulfide suitable for use at high temperature contributes to improvements of the mechanical strength as well as the friction coefficient, the preferable alloy being that of the composition of 77Cu-23Pb or 90Cu-5Sn-5Pb. While the addition of 10 - 30 wt percent of a metal salt of tungustate contributes to the formation of strong film or coatings at a high temperature and to prolongation of bearing life.