176results about How to "Avoid contact corrosion" patented technology

A bumper for a motor vehicle includes a cross member which is disposed transversely to a side rail of a motor vehicle frame. A crash box is incorporated between the cross member and the side rail, with set bolts being provided to join the crash box to the cross member in the absence of prepunching.

The present invention provides a downhole method and apparatus using a flexural mechanical resonator, for example, a tuning fork to provide real-time direct measurements and estimates of the viscosity, density and dielectric constant of formation fluid or filtrate in a hydrocarbon producing well. The present invention additionally provides a method and apparatus for monitoring cleanup from a leveling off of viscosity or density over time, measuring or estimating bubble point for formation fluid, measuring or estimating dew point for formation fluid, and determining the onset of asphaltene precipitation. The present invention also provides for intercalibration of plural pressure gauges used to determine a pressure differential downhole. A hard or inorganic coating is placed on the flexural mechanical resonator (such as a tuning fork) to reduce the effects of abrasion from sand particles suspended in the flowing fluid in which the flexural mechanical resonator is immersed.

A method for the manufacture of a fiber-reinforced component includes heating a blank of a carbon-fiber-reinforced thermoplastic plastic material to at least a melting temperature of the thermoplastic plastic material; introducing the blank into an at least two-part moulding tool; forming the fiber-reinforced component by applying pressure on the blank using the moulding tool; and injecting a further thermoplastic plastic material into at least one edge region of the moulding tool so as to form an edge seal.

The invention relates to hot dip coating alloy specially used for surface coatings of titanium alloy parts. The hot dip coating alloy consists of aluminum, silicon, zinc, rare earth elements, magnesium, ferrum and reinforcing agent of particles of nano oxides, and based on the total weight of the alloy, the alloy comprises 8 to 24 percent of silicon, 1.2 to 3.1 percent of zinc, 0.02 to 0.5 percent of rare earth elements, 0.5 to 3.2 percent of magnesium, 0.05 to 1 percent of ferrum, 1 to 2 percent of reinforcing agent of particles of nano oxides, and the balance of aluminum and inevitable impurities, wherein the reinforcing agent of the particles of the nano oxides may be one or two of TiO2 and CeO2. The hot dip coating alloy produced by the method can form a coating with good corrosion resistance and wearing resistance and good metallurgical bonding property with a matrix on the surface of the titanium alloy.

The invention relates to a method for carrying out surface activating treatment on the surface of titanium alloy. The method includes the following steps: 1. oil and rust removing is first carried out on a titanium alloy base material part; 2. etching treatment is carried out on the part; 3. surface activating treatment is carried out on the part, wherein activating solution of the surface activating treatment is a mixture of glycol, acidic ammonium fluoride, nickel chloride, boric acid, lactic acid and acetic acid, the temperature of the surface activating treatment is within 40 to 60 DEG C, and the time of the surface activating treatment is within 30 to 40min; 4. drying and after-treatment procedures are carried out. Compared with the prior art, the method has the following characteristics: the activating time is short, the activating effect is good, no corrosion is incurred on the part, the risk of corrosion on the part is basically eliminated, and the environmental pollution is mild; with high stability and quick deposition, the activating solution that the method adopts can form a coating with good corrosion/wear resisting properties and good metallurgical combination with a matrix on the surface of the titanium alloy, thereby preventing contact corrosion between the titanium alloy part and aeronautical materials such as aluminum alloy, high-temperature alloy and the like.

A method for the production of bipolar plates or electrode plates for fuel cells or electrolyzer stacks is provided, whereby the bipolar plates or electrode plates have at least one punched band and/or at least one punched blank that are punched from a flat material made of a conductive and corrosion-resistant metal and surrounded with plastic, by means of injection molding. A method for the production of a stack of bipolar plates or electrode plates is also provided. The bipolar plate or electrode plate has strips of a punched band material made of a conductive and corrosion-resistant metal.

A circuit for preventing corrosion of a contact, includes an input terminal, a signal line, a switch, an impedance element, and a comparator. The input terminal is to be connected to the contact, which is outside the circuit. The signal line is connected to the input terminal. The switch is connected to the signal line. The impedance element is connected to the signal line in parallel to the switch. An impedance of the switching section is smaller than that of the impedance element. The comparator compares a potential of the signal line with a predetermined potential. The switch is turned on based on a comparison result output from the comparator.

The invention relates to a motor vehicle axle component and a method for producing a motor vehicle axle component. The axle component, for example a dead beam axle, includes a light metal body, such as aluminum or magnesium or corresponding alloys, and a tubular body in form of a steel tube, which are adhesively connected with each other. An adhesive pocket filled with an adhesive is formed between an end of the tubular body and a cylindrical receptacle of the light metal body. Respective bezels are arranged on a free end of the receptacle and on a free end of the tubular body. The spaces between the respective bezels and adjacent walls are filled with adhesive, which seals the interior and exterior transition regions of the joint zone, thus protecting the joint zone against corrosion, improving the load characteristic of the axle component and increasing its service life.

The invention discloses an electrocoppering method for TC2 titanium alloy. The method comprises the following steps of (1), selecting Emery with the particle size not larger than 60 meshes for performing abrasive blasting on the TC2 titanium alloy, wherein the abrasive blasting pressure ranges from 0.3 MPa to 0.5 MPa; (2), performing activating treatment on the TC2 titanium alloy in acid solutions after abrasive blasting, and reducing the thickness of the surface of the TC2 titanium alloy by two micrometers to seven micrometers; (3), placing the activated TC2 titanium alloy in the sulfuric acid and hydrochloric acid mixed solutions with the temperature of 18 DEG C to 25 DEG C for 30 min to 60 min for hydrotreating; (4), performing copper plating on the hydrogenated TC2 titanium alloy. According to the method, the binding force of the surface of the TC2 titanium alloy and a plating layer of the TC2 titanium alloy is ensured and improved, the electrical conductivity of the TC2 titanium alloy materials is improved, contact corrosion is prevented from happening to the TC2 titanium alloy materials and cadmium metal, and then the comprehensive performance of the TC2 titanium alloy materials is improved.

A method for preventing corrosion of a contact, includes comparing a potential of a signal line connected to the contact with a predetermined potential corresponding to the corrosion of the contact; flowing a corrosion-prevention current into the contact when a result of the comparing shows that the contact is corroded; inputting into the signal line a signal used for judging a logical value of a connection state of the contact; and in the magnitude relation, setting the predetermined potential on another side of a threshold level used in the judging of the logical value of the connection state of the contact.

The invention relates to a sacrificial anode structure. The sacrificial anode structure comprises a checking head, a plug screw and a corrosion block. Both the plug screw and the corrosion block are made of metal. The activity of the corrosion block is higher than that of the plug screw. A first hole and an indication channel are formed in the plug screw. A second hole is formed in the corrosion block. The plug screw and the corrosion block are fixedly connected. The first hole, the second hole and the indication channel are mutually communicated. The checking head is fixedly connected to the end of the plug screw. The sacrificial anode structure is simple, and the requirement for the manufacturing level is quite low; the corrosion state of a sacrificial anode can be known at regular times conveniently and rapidly, and timely monitoring and replacing are conducted; meanwhile, an insulation material is used between the plug screw and the corrosion block so that dissimilar metal contact corrosion between the plug screw and the corrosion block can be avoided, and the service life of the sacrificial anode is prolonged.