31results about How to "High degree of corrosion resistance" patented technology

The invention discloses a passive film treating agent for die cast aluminium alloy and a treatment method thereof. The passive film treating agent for die cast aluminium alloy comprises the following components in parts by mass: 1 to 20 parts of inorganic acid, 1 to 20 parts of zirconate, 1 to 20 parts of vanadate, 1 to 20 parts of manganate, 1 to 20 parts of calciate and 0.2 to 10 parts of an activating agent. Relative to a traditional phosphorus-containing chromium-free passive film treating agent for die cast aluminium alloy, which causes pollution to the environment, the passive film treating agent for die cast aluminium alloy can form a phosphorus-free chromium-free Zr-Mn-V passive film on the surface of die cast aluminium alloy, the passive film has the advantages that the adhesive force is good, the corrosion resistance is high, and the salt mist resistance and film forming uniformity are good, and besides, the obtained passive film can be guaranteed to have a silver white metal appearance the same as the die cast aluminium alloy.

The invention discloses a steel pipe hot-dip galvanizing automatic production line. The steel pipe hot-dip galvanizing automatic production line consists of a steel pipe pretreatment mechanism (1), a steel pipe automatic hot-dip galvanizing mechanism (2) and a galvanizing aftertreatment mechanism (3); the steel pipe pretreatment mechanism (1), the steel pipe automatic hot-dip galvanizing mechanism (2) and the galvanizing aftertreatment mechanism (3) are mounted on the ground in sequence from left to right; the steel pipe pretreatment mechanism (1) is provided with a mist sucking cover (1-9); an elastic car (2-3-1) is arranged on the right side of a pipe fishing mechanism (2-3); and an oven uniform heating fan (3-5-1) is arranged at the top of a primary passivation oven (3-5). The steel pipe hot-dip galvanizing automatic production line treats and galvanizes steel pipes through a single continuous production mode, uses two times of organic and inorganic passivation to largely reduce the environmental protecting energy consumption, improves the working environment cleanness and the product corrosion resisting degree, reduces the user use cost, and achieves the purposes of high efficiency, environmental protection, energy conservation and high quality in steel pipe galvanization.

The invention relates to the technical field of the transition potential of an amorphous strip passivation film, in particular to a method for testing the transition potential of an amorphous strip passivation film by a galvanostatic method, comprising the following steps: placing the amorphous strip on three electrodes In the workstation, test the TAFEL curve to obtain a passivation platform, and select potential value points from the passivation platform; for the selected potential value points, test according to the galvanostatic method to obtain the transition potential of the amorphous strip. The invention expands the application fields of the iron-based alloy and the amorphous material, and can apply the amorphous material to more practical productions, exert a greater role of the amorphous alloy, and make it have a greater application prospect.

The invention discloses an industrial acidic waste water treatment device. The industrial acidic waste water treatment device comprises a tank body, oxygen supply pipelines, and aeration parts which are arranged in the tank body; the aeration parts are detachably connected with the oxygen supply pipelines, and each aeration part comprise a pedestal, a main pipe arranged on the pedestal, and a plurality of branched pipes which are connected with the main pipe; a blocking part capable of rolling forward under oxygen supply states and a magnetic part used for driving the blocking part to roll backward under oxygen supply stopped states are arranged in each branched pipe; and each magnetic part is arranged on the internal wall of the corresponding branched pipe. According to the industrial acidic waste water treatment device, the blocking parts and the magnetic parts are arranged in the branched pipes, so that blocking of the branched pipes is realized, the internal parts of the branched pipes are maintained to be clean, blocking of the branched pipes by sludge is avoided, the corrosion resistance is excellent, and the service life is long.