58results about How to "Corrosion resistant and stable" patented technology

A geopolymer grouting material is prepared from, by weight, 20-40 parts of stone flour, 30-45 parts of fly ash, 10-25 parts of silicon micro-powder, 25-35 parts of mineral slag powder, 5-10 parts of an alkali exciting agent, 5-10 parts of sodium hydroxide, 0.5-1 part of sugar calcium, 3-5 parts of re-dispersible latex powder, 1-3 parts of a polycarboxylic water reducer, 1-3 parts of sodium alkane sulfonate, 1-3 parts of aluminum stearate, 10-15 parts of phenolic resin, 0.5-1 part of N,N-dimethylaniline, 0.5-1 part of methylethyl ketone peroxide, 0.5-1 part of sodium polyacrylate, 0.5-1 part of triethanolamine and 0.5-1 part of citric acid. The 1d strength of the prepared grouting material is not less than 20.0 MPa, the flowability is not more than 20 s, the initial setting time is not less than 25 min, and the final setting time is not more than 60 min. The grouting material is widely suitable for rapid repairing of roads, underside grouting of cement concrete pavement soft base processing, bridge reinforcing and crack repairing, deep curtain grouting, lower margin bolt anchoring and other engineering positions. Compared with traditional cement-based grouting materials, the grouting material disclosed in the invention has the advantages of low cost, good corrosion resistance, good heatproof stability, good erosion resistance and good durability.

The invention relates to a carbon gel catalyst for fuel batteries and application thereof. By adopting resorcinol, formaldehyde, a coordination compound, a metal salt and a metal organic compound as raw materials, the carbon gel catalyst which is controllable and adjustable in pore structure and specific surface area is prepared through controlling the adding of the metal salt of different amounts and adjusting the precursor solution concentration, the reaction environment temperature and the carbonization and nitridation treatment temperature. When serving as a nonmetal catalyst for a proton exchange membrane flue battery cathode catalyst, the carbon gel catalyst disclosed by the invention shows good corrosion resistance and stability after long-term use; the preparation process of the catalyst is simple in flow, short in period and friendly to environment; the catalyst is low in cost and wide in application range.

Catalyst layers include an electrocatalyst having high oxygen reduction activity that is useful as an alternative material to platinum catalysts. Uses of the catalyst layers are also disclosed. A catalyst layer of the invention includes an electrode substrate and an electrocatalyst on the surface of the electrode substrate, and the electrocatalyst is formed of a metal compound obtained by hydrolyzing a metal salt or a metal complex.

Electrocatalyst layers include an electrocatalyst having high oxygen reduction activity that is useful as an alternative material to platinum catalysts. Uses of the electrocatalyst layers are also disclosed.The electrocatalyst layer includes an electrocatalyst that is formed of a metal oxide obtained by thermally decomposing a metal organic compound. The metal element forming the electrocatalyst is preferably one selected from the group consisting of niobium, titanium, tantalum and zirconium.