40results about How to "Full corrosion resistance" patented technology

An electrically conductive flow-field plate in a proton exchange membrane fuel cell comprises a composition made of a resin and a plurality of carbon nanotubular fibers having an average diameter is at least about 0.5 nm and up to about 300 nm. The carbon nanotubular fibers are present at not more than about 85 wt. %. The resin can be of a thermoplastic type, a fluorinated type, a thermosetting type and a liquid crystalline type.

Provided are: a ferritic stainless steel which has sufficient corrosion resistance and excellent formability; and a method for producing this ferritic stainless steel. The ferritic stainless steel according to the present invention contains, in mass%, 0.005-0.05% of C, 0.02-0.50% of Si, 0.05-1.0% of Mn, 0.04% or less of P, 0.01% or less of S, 15.5-18.0% of Cr, 0.001-0.10% of Al and 0.01-0.06% of N, with the balance made up of Fe and unavoidable impurities. This ferritic stainless steel is configured to satisfy El>=25%, (average r value)>=0.70 and the absolute value of delta r<=0.20.

The invention discloses anhydrous refrigerating fluid for an internal combustion engine, and relates to the technical field of refrigerating fluid. The anhydrous refrigerating fluid is prepared from the following raw materials in percentage by mass: 85.53 to 95.0 percent of basic liquid, 1.2 to 3.0 percent of nano-particles, 1 to 3 percent of alkaline supplement agent, 0.75 to 1.47 percent of corrosion inhibitor, 0.5 to 2.0 percent of anti-foaming agent, and 2 to 5 percent of additive. A pH value is stabilized at 7.5 to 8.0; the basic liquid is prepared from mixed alcohol of ethylene glycol and propylene glycol; a nano-particle mixture is prepared from copper oxide nano-particles, silicon dioxide nano-particles and aluminum oxide nano-particles; the corrosion inhibitor is prepared from a mixture of sodium benzoate, heptanoic acid, toluene triazole, triazole, isooctanoic acid and diethylene glycol monomethyl ether. The anhydrous refrigerating fluid disclosed by the invention has high performance on comprehensive protection of multiple metals of an automobile cooling system; the complex type anhydrous refrigerating fluid has the advantages of good corrosion inhibitive ability, longlasting property, storage stability, high resistance to hard water, environmental friendliness and safety.

The present invention provides a corrosion prevention method for an aluminum-based metal component, which makes it easy to check the presence or absence of a chemically formed film on the component, and a corrosion-proof aluminum-based metal product produced by the method. In the method, the following treatment agent (A) is brought into contact with a surface of the aluminum-based metal component to chemically form the following film (B) on the surface of the aluminum-based metal component: (A) a treatment agent comprising an aqueous solution of zinc sulfate, an aqueous solution of ammonium fluoride and an aqueous solution of sodium molybdate which are mixed together; (B) a chemically formed film (B) comprising zinc fluoride, molybdenum and aluminum fluoride.

The invention relates to a protective element for connecting to a concrete element of a tunnel extension, which has a protective section having a first side facing the concrete element (10), on whichfirst side at least one connecting element (17) is provided for establishing a retaining connection of the protective section to the concrete element (10), wherein the protective section is made fromat least one plastic material, characterized in that the protective section (20) has at least one drainage element (40) through which a fluid can pass from the first side of the protective section (20) to the opposite side of the protective section (20) facing away from the concrete element (10).

An eye drop composition which contains a quaternary ammonium salt in a reduced amount and, despite this, has a sufficient antiseptic effect. The composition contains nipradilol as a medicinal ingredient and is characterized by containing 0.0005 to 0.005% by mass cationic surfactant which is a quaternary ammonium salt.