33results about How to "Improve the quality of anticorrosion" patented technology

The invention discloses the application of a solvent-free two-component epoxy coating to joint wrapping anticorrosion of pipelines, and belongs to the field of coatings. The epoxy coating contains an aliphatic chain structure in the length of about 36 carbon atoms. When being used in the joint wrapping, the solvent-free two-component epoxy coating coats on the surface of a three-layer polyethylene coating and heated under high temperature of 120 to 260 DEG C for 20 s-20 min. The epoxy coating can form a fusion bonding with the three-layer polyethylene coating, so as to enhance the initial adhesion stress and durable adhesion stress between coatings.

The invention discloses an antiseptic operation system of a hot bending bent pipe and an operation method thereof. The antiseptic operation system of the hot bending bent pipe comprises a rotary cantilever which comprises a rotary beam and an arc-shaped cantilever, wherein the rotary beam rotates along a revolving axle, and the arc-shaped cantilever is arranged on the rotary beam; one end of the rotary beam is installed on the revolving axle, and the other end of the rotary beam is supported on an arc-shaped rail; the hot bending bent pipe is fixedly arranged on the arc-shaped cantilever; a medium-frequency heating device, a powder spraying device, a winding device and a cooling device are arranged along the movement locus of the arc-shaped cantilever; and the hot bending bent pipe is successively matched with the medium-frequency heating device, the powder spraying device, the winding device and the cooling device. The invention can simplify the antiseptic drive lines of three layers of PE of the hot bending bent pipe, can quickly improve the operation time of the antiseptic production of the three layers of the PE of the hot bending bent pipe, improves the efficiency of mechanical antiseptic production of the three layers of the PE of the hot bending bent pipe and realizes the mechanical high-efficiency antiseptic production of the three layers of the PE of the hot bending bent pipe.

The invention discloses an anti-mildew and anti-corrosion treatment device for finished bamboo strips. The anti-mildew and anti-corrosion treatment device comprises a body and is characterized in thatuniversal wheels are mounted all around the lower end face of the body, conveying cavities in left-right symmetry are arranged in the body, bamboo strips are placed in the conveying cavities, the left ends of the bamboo strips penetrate the left conveying cavity and extend out of the body, a conveying device is arranged on the outer side of each conveying cavity, a steam cavity is communicated tothe left side of the right conveying cavity, and a steam device is arranged in the steam cavity. The anti-mildew and anti-corrosion treatment device has the advantages that the anti-mildew and anti-corrosion treatment process includes fumigating, dry rubbing, chemical coating, cooling and drying, various process flow in the device is performed continuously, fast anti-corrosion treatment is achieved, and the device driven by one motor is low in energy consumption and high in efficiency.

The invention relates to a polyethylene coated steel pipe and on-line method and apparatus for preparing same. Steel pipe is employed as base material for polyethylene coated steel pipe, and the outer surface of the steel pipe is coated with jointless annular polyethylene gummed tape. Production facilities of the pipe includes steel pipe shot-blast rust cleaning machine comprised of a rotating cylinder bracket, a rotating cylinder, a feeding wheel, a support wheel, a feeding worm wheel speed reducer, a feeding direct current dynamo, a high-frequency induction heating coil, a driving worm wheel speed reducer, a driving AC motor and a electrical control cabinet, and a steel pipe outer anticorrosion coating machine comprised of a induction heating transformer, a walking frame, a swing frame,a rotating frame, a winding device, a supporting frame, a low-voltage electrical casing and a controller. In pipeline installation locale, the steel pipes are welded into pipelines after derusted by the steel pipe shot-blast rust cleaning machine, the steel pipe outer anticorrosion coating machine is nested on the pipeline and carries out helical motion, after high-frequency induction heating on the steel pipe, the spray head injects the epoxy powder on outer surface of the steel pipe, after high-frequency induction heating of the belt-winding cylinder, adhesive tape and polyethylene gummed tape pulled out from the winding device become hot tapes, by helical motion of the steel pipe outer anticorrosion coating machine along pipeline centre-line, the adhesive tape and polyethylene gummed tape are coated on the outer surface of the steel pipes.

The invention discloses a novel phosphorus-spraying film-forming liquid and its process for spraying phosphorus. The phosphorus-spraying film-forming liquid is composed of raw materials with the following mass ratios: Zn 2+ : 3000PPm~6000PPm, Mn 2+ : 300PPm~600PPm, F ‑ : 600PPm~1200PPm, MoO 4 2‑ : 250PPm~500PPm, NO 3 ‑ : 8000PPm~15000PPm, PO 4 3‑ : 11000PPm~19000PPm, composite accelerator A 300PPm~900PPm, additive B 600PPm~1200PPm, the balance is water, of which PPm is one millionth, and adjust the free acid, total acidity and acid ratio of the bath to control Temperature, pump pressure, nozzle spray density and spray time. The invention solves the difficulty of spraying and phosphating the high-strength steel projectiles and parts of missile products, improves the anti-corrosion performance of missile products, thereby ensuring the effectiveness of missile products and prolonging their service life to ensure national defense security. Realize automatic production, improve production efficiency, and meet the requirements of lean production and clean production advocated by the state.

The invention discloses a fusion bonding method of an epoxy coating with a three-layer polyethylene coating, and belongs to the field of joint wrapping anticorrosion. The method comprises the following steps: first, removing the dirt on the surface of the three-layer polyethylene coating by water; then coating epoxy coating on the surface of the clean three-layer polyethylene coating, and heating at the temperature of 120- 260 DEG C for 20 s-20 min. The epoxy coating is a solvent-free two-component epoxy coating comprising a fatty chain structure with molecular chain length of about 36 carbon atoms. According to the invention, the three-layer polyethylene coating and epoxy coating are heated, so that the long fatty chain of the three-layer polyethylene coating and the long fatty chain of the epoxy coating twisted in the molten state and further form fusion bonding between the three-layer polyethylene anticorrosion coating and the oxygen coating; and the initial adhesion and durable adhesion of the coatings for the pipeline joint wrapping anticorrosion are improved, and the quality of joint wrapping anticorrosion is improved.

The invention provides a cooling method and cooling equipment for manufacturing anti-corrosion steel pipes. The cooling method for the manufacture of anti-corrosion steel pipes is as follows: when the first pipe end of the steel pipe advances from the anti-corrosion work area to the cooling area, the first internal cooling device moves along the steel pipe axis at the same speed, and the cooling nozzle reaches the cooling working position and starts, with The telescopic mechanism also moves to the inside of the steel pipe at the same speed, so that the cooling nozzle remains still; when the second pipe end of the steel pipe advances to the position of the cooling nozzle, the first internal cooling device returns to the initial position and waits; the first internal cooling device and The second internal cooling device alternately internally cools the steel pipes passing through the cooling zone continuously. The cooling equipment for implementing the above cooling method includes a transmission device, a first internal cooling device, a second internal cooling device and a control system. The cooling method and cooling equipment of the present invention realize uninterrupted internal cooling of the continuously produced anti-corrosion steel pipes, and improve the anti-corrosion quality and cooling efficiency of the steel pipes.