hydrogen flame can be used as an alternative to acetylene during cutting, soldering and welding.In contrast to the official methods, the hydrogen welding is virtually harmless.This is caused by steam, which is the product of the combustion process.If you own a gas welding skills, you can learn quite quickly and hydrogen.If not - take a little longer, but the result will be worth it.In this article, we'll tell you how you can do with your hands hydrogen welding.
- Features hydrogen welding
- Possible use of hydrogen devices
- hydrogen welding at home
- safety requirements when welding hydrogen
Features hydrogen welding
Gas welding has been around for a hundred years.As the basic fuel gas acetylene is used.The results of the study showed that the use of hydrogen instead of acetylene is more productive.When welding materials obtained by the same production and quality of the weld.The only difficulty is that acetylene flame recovers
hydrogen welding is a type of flame treatment, which is done using a mixture of oxygen and fuel gas.With the involvement of hydrogen as a fuel gas weld pool is covered with a large layer of slag and the seam is thin and porous.But this problem was solved.Organic substances tend to bind oxygen, so the decision was made on their application.Steels used hydrocarbons which have a boiling temperature of 30-80 °.This hexane, toluene, benzene, heptane, benzene.For a minimal amount of welding necessary.
When technological issues have been successfully resolved, there was another difficulty.There was no efficient source of oxygen.Hydrogen tanks are a source of danger, so their use is not profitable.The high concentration of liquid hydrogen may cause dizziness, suffocation and severe frostbite.But the main danger is a hydrogen flame it invisible in daylight.
Happy hydrogen flame can be identified by the use of special sensors.This problem was solved by placing the water into hydrogen and oxygen under the influence of electricity.Electrolyzers - are devices which, when an electric energy can produce hydrogen and oxygen simultaneously.
worth noting that hydrogen is suitable for welding of various products of iron and low-carbon steels, is completely unsuitable for welding stainless steels.This is due to its dissolution in the molten nickel.When the metal solidifies it stands back, forming cracks and pores.Oxy-hydrogen welding and not suitable for copper.But its advantage is that the hydrogen atmosphere protects the work piece from oxidation.
Acetylene generators and cylinders are required for use in the field when there is no source of electricity.But in other cases, a massive gas-welding equipment can replace the lightweight and comfortable hydrogen vehicles.
Possible use of hydrogen devices
hydrogen welding machine is powered by a three-phase mains and household, have different capacity.The device can be used in manual or automatic mode.Standard acetylene torch is supplied through the hose composition of hydrogen and oxygen, the temperature of pure flame can be adjusted from 600 to 2600 degrees.
hydrogen welding machines are very easy to use.They do not need to be recharged frequently, and the complexity is small.As a rule, they are included in the operating mode for only a few minutes, depending on the desired consumption of gas and the room temperature.When the small size of the machine equipment can be very powerful.
hydrogen welding is very ecological, as opposed to acetylene, the work with which contaminates the environment with toxic substances.The hydrogen-burning appliances only product is completely harmless vapor.In addition, when using and storing these devices are completely safe.But do not neglect the protective clothing - gloves, thick robe and glasses for gas welding.
Such devices solve almost all tasks set before the flame treatment materials.With these devices it is possible to carry out welding, soldering, powder-coated, hand and machine oxygen cutting, surfacing, heat strengthening powder surfacing.There are different modes that provide the ability to perform a wide range of works - from welding to cutting the minimum thickness steel plates.Even small portable devices with low power can cook and cut sheet black and nonferrous metal up to two millimeters thick.
hydrogen welding devices are very popular among jewelers, dentists and specialists in repair of refrigerators.Models with greater capacity allow material to be welded to three millimeters thick.They are very popular in the service station equipment, because these places are prohibited from using hazardous cylinders of oxygen and propane.
hydrogen welding devices can be used during the body work, repair of batteries, engine blocks and wheel hubs.When the threshold level of pressure and the electrolyte is achieved, integrated control system itself sends a signal.In this case, the device is automatically disconnected from the power source.Due observance of safety measures, provides a nice fire and explosion.
for responders companies have developed special options that welded pipe with wall thickness of up to five millimeters.Such devices can be used for welding zones marriages iron and non-ferrous castings, machine and hand cutting to thirty millimeters thick wall.These methods of welding is carried out with preheating powered flame torch from the instrument and supply of oxygen from the cylinder.
With this technology gives a very clean cut, compared with acetylene and propane.Also, there are no emissions of nitrogen oxide and beads, metal is not saturated with carbon and quenched.These welding machines are often used in wells, tunnels and subways, as there is also prohibited the use of propane and acetylene.There are species that provide an opportunity to carry out welding of hydrogen at temperatures below zero.
hydrogen welding at home
hydrogen welding device is suitable to every home handyman.Hydrogen vehicles are quite expensive.Also bought devices are very difficult to use for working with small details.You can make such a welding machine at home.All components can be assembled from conventional materials.Let's see how to do it right.
hydrogen mixture comes from the electrolysis of aqueous alkali - caustic soda.The current source can be drawn from the rectifier for battery charging from the car.For home use will be small enough performance, so the design can be simplified.
Electrolysis occurs in the vessel, so the sealing water in the home can be used a glass jar with a polyethylene cap at 0.5 liters.The cover needs to be done in terms of the conclusions of the contact electrode plates and sleeves for tube removal of the gases.This is followed by sealing all the conclusions and the very cover your regular glue "Moment".It should be noted that the curved serpentine electrodes are plates 4 cm wide stainless steel.
venting through the sleeve must be filled jar electrolyte (8-10% mixture of sodium hydroxide in purified water) through a syringe in 50 ml.Gidrodozatora function performs a second vessel, wherein the product gas obtained by bubbling and the saturation vapor of combustible materials while passing through the 60-70% solution thereof in water.
This mixture must come into the third container with water, which is the gate to exit gases.Safety at work improves the activation of two bolts, which are sequentially arranged and preclude flashback from the device to the electrolyzer.For more security, you can make a second shutter of plastic.
gas with oxygen, hydrogen and vapors of flammable substances out through the medical needle.The flame temperature can reach 2500 degrees, but it can be adjusted by changing the applied voltage.Make sure that the combustion process has been persistent.If you change the voltage across the electrodes, and the current change, which affects the dose emitted gas.
You can easily check this by calculations using the known formula of Faraday.Sleeve tube can be operated by the handles helium, droppers, etc., as shown in a video of hydrogen welding.Note that the needle diameter welder must be from 0.6 to 0, 8 millimeter, and the third vessel is necessary to use a plastic jar.The resulting structure must be put into the body, the right size.
the electrolysis consumes water, the amount of alkali remains the same.Alkali disintegrates into ions and conductivity of the solution increases.You can replenish the fuel mixture by a conventional medical syringe with a needle.For the needle holder can use the wooden handle of the tool, which also drilled the point of the tube diameter.Be sure to put cotton swabs inside the tube of the syringe at its base and end.This precaution will prevent flashback through the tube into the vessel with an alcohol compound.
straightener you can collect yourself on diodes, through their connections on the half-cycle scheme.You can use any suitable transformer with a capacity of at least 180 watts.Perfect transformer from the old Soviet TV.It is necessary to remove the secondary windings and the new reel using thick copper winding wire 4 millimeters.It is desirable to make elbows for regulating the output voltage, which provides cell operation under load.Good voltage across the electrodes should be controlled within 3V, because the instrument is just a galvanic period.
flame temperature depends on the composition of the fuel mixture.You can use acetone or ethanol.In the case of acetone can not be put on the sleeve of the tubes helium pens, because they dissolve in it.If the amount of alcohol in the mixture of exhaust gases is reduced and the prevailing oxygen flame may be extinguished.When assembling the apparatus for homemade hydrogen welding remember all the above rules, especially on a cotton swab and the third vessel of plastic.Remember that the quality of collected and sealed the device will work for a long time with proper maintenance.
safety requirements when welding hydrogen
hydrogen welding can be very dangerous.There may be accidents due to the explosion of mixtures, ignition of oxygen gear, flashbacks.You should carefully read the safety precautions before engaging in hydrogen welding.Here we present the basic rules.
- gas welding is prohibited to spend too close to flammable and flammable substances.If you spend a weld in rooms, boilers or confined areas, makes permanent and breaks out into the fresh air.In a closed and semi-closed spaces harmful gases must be removed with the help of local exhausts.If you are welding in tanks, the process must be supervised by a second person who is outside.
- during welding and cutting, be sure to use special protective glasses.Otherwise the bright rays may adversely affect the retina and blood of the eye up to the onset of cataracts and blindness.Spatter and slag are also a great danger to the open eye.
- When using gas cylinders better carry them on stretchers or on the trolley, with the obligatory use of a protective cap.Conventional methods of transportation are unsafe.In the carriage of gas cylinders must not touch each other and fall.In the area of metal cutting or welding is prohibited to store oxygen cylinders.Move over short distances is done we turn with a slight slope.If the cylinder occur mixture of oxygen and fuel gas (when oxygen pressure in the cylinder below the operating pressure regulator), can happen explosion.Therefore, you should use the gears with a working pressure gauge.
- During welding flame should be directed to the side, which is on the other side of the power supply.If you can not fulfill this condition, fences source with an iron shield.When working gazoprovodyaschie sleeves should be close to a welder.During the break, be sure to extinguish the flame.
- If more than ten welding stations, gas supply has to go through the wires acetylene stations.Acetylene generators should be installed in a room with a fan and a temperature of not less than five degrees.Keep a water bar was filled to the required level.When a faulty or disconnected water gate work is prohibited.
gas welding technology using hydrogen is the same as in gas welding.The only difference is in the use of hydrogen mixture.Before you make your own hydrogen weld, read again the above rules and tips.We hope that our information will help you make a quality instrument and understand the technology of the process.