Do-it-yourself silver chain repair

In detail: do-it-yourself silver chain repair from a real master for my.housecope.com.

If there is a trouble in the form of a broken silver chain, do not despair and rush to get rid of the product. The jeweler will help correct the situation. However, it is not always possible to turn to him for help.

In addition, such a service will not be cheap and will amount to almost half the price for the item itself. You can try to solve the problem yourself and solder the silver chain at home using available tools.

Before deciding to solder parts of a silver product on your own, you need to understand the physico-chemical properties of the noble metal. The melting point of silver is 960 degrees. This is an average for the various metals from which jewelry is made.

Image - Do-it-yourself silver chain repair

The melting point depends on how much pure silver is contained in the alloy. In order for the ration to turn out to be of high quality, you need to thoroughly approach the choice of silver solder.

It is a strong solder joint and is used for soldering both non-ferrous and ferrous metals, as well as various alloys. For ease of use, all solders are labeled with an alphanumeric set. The digital indicator determines the amount of silver in the solder as a percentage.

Any seam soldered with solder is resistant to corrosion, does not deform, and is durable. The most important factor of the above is anti-corrosion. In order to observe this moment, you should choose solders in which there is a high content of pure silver.

If it is impossible to purchase solder in special outlets, you can make it yourself. The most common and high-quality composition, which includes:

  • Silver - 45%;
  • Copper - 25%;
  • Zinc - 30%.
Video (click to play).

All components are melted in a muffle furnace. The mixture after melting is poured onto the substrate and passed through the machine to obtain sheets of the desired thickness. Sheets of 1-3 mm are used for soldering. Strips of the required length are cut from them.

In order for the soldered seam to be strong, it is necessary to prepare the following materials and tools:

  • Image - Do-it-yourself silver chain repairThe base for the main work (asbestos plate or bricks), resistant to high temperatures;
  • Silver solder;
  • Flux;
  • Acid pickling solution;
  • Sulfuric liver;
  • small brush;
  • Tweezers or tweezers;
  • wire cutters;
  • gas burner;
  • Copper tongs;
  • A clean piece of light-colored matter.

At home, you can use one of two soldering options applicable to silver:

1. Gas burner. This method is not only simple, but also cost-effective. You need to act as follows:

  • Clean the entire surface of the soldered parts from visible dirt and blackness;
  • Apply a thin layer of flux to the elements. You can cook it yourself. To do this, the borax is poured with water and heated in a water bath. The mixture is cooled, and the resulting crystals are crushed in a mortar.
  • Put the pre-prepared necessary piece of solder in the place of soldering. It can be cut with wire cutters;
  • The gas burner should heat the product from its side, paying attention to the position of the solder. It must not be blown away by flames;
  • As the flux melts, the flame should be increased until the solder forms a seam. If there are not enough materials, they can be added in the course of work;
  • After the soldering is completed, let the product cool down and wipe all parts of the soldered object at the junction with sandpaper to remove traces of flux.She will remove excess solder.

2. Soldering iron. To solder parts of the product with a soldering iron, you should choose a device with a thin tip. Solder for such work is better to buy POS-60. It starts to melt at a temperature of 180 degrees.

Image - Do-it-yourself silver chain repair

This solder is somewhat different from the usual types. It is made in the form of a tube, the inside of which is filled with resin. It is she who is an alternative to flux from borax and performs the function of protecting the alloy from possible oxidation. The procedure will be as follows:

  • The surface of the product is cleaned from oxides and other contaminants;
  • The joints are heated to such a temperature that it becomes higher than the melting point;
  • Solder is placed in place of melting, with a flux embedded in it;
  • The soldering iron heats up the surface of the product. Under the influence of high temperature, the solder begins to melt and evenly distribute over the surface;
  • The product is allowed to cool and the joints are cleaned with sandpaper.

When working with a torch and a soldering iron, precautions must be taken, as both devices can cause a fire.

It is important to understand that any poor-quality work can ruin the product. Therefore, if possible, it is better to entrust a torn chain or other silver jewelry to professionals.

From time to time, silver items require repair, and the question arises: how to solder silver at home? Indeed, for several centuries, mankind has been using silver products. Spoons, forks, bracelets, chains, caskets and rings decorate our lives and emphasize the individuality of the owner.

Tools and materials for soldering: a - conventional soldering irons, b - electric soldering iron, c, d - irregular shape of the soldering iron, e - casting solder into a form convenient for work.

You can entrust the repair of your favorite little thing to a professional or perform the necessary actions yourself, with your own hands. For the latter option, you will need to master the technological methods, procedures and put into practice information on materials science and other necessary information.

Soldering any metals requires knowledge of the physical and chemical properties of the material. Silver melts at a temperature of 960ºС, which is the average value for metals used in the manufacture of jewelry. For example, the temperature required to reach the melting point of copper is 1083ºC, and for gold it is 1063ºC.

Alloys containing silver have different melting points. The exact values ​​​​are indicated in specialized reference books. In particular, PSr-25, PSr-10, PSr-12. Silver solders are marked with a sequence of letters and numbers. The numerical values ​​correspond to the percentage of silver in the solder.

Preparing the soldering iron for work and cleaning the surface: a - heating the soldering iron with a blowtorch, b - ways to mount the soldering iron on a blowtorch, c - stand for the soldering iron, d - tinning the soldering iron on a brick.

Read also:  Chainsaw stihl ms 180 DIY repair

In modern production, solders containing silver are an important, integral component of the technological process, since welds brazed with silver solder guarantee strength, high density and resistance to corrosion. Anti-corrosion should be recognized as the most significant quality. With increasing requirements for strength and resistance to corrosion, it is necessary to use solders with a high silver content. In some cases, soldering with 70% silver solder is used.

Solder for silver is purchased in specialized stores. It is preferable to use refractory solder (melting point above 240ºС), use an alloy marked PSR2 and PSR-2.5, or use a specialized soldering paste.

You can also make your own solder. Silver-copper-zinc and silver-copper-cadmium-zinc solders are used. The most optimal composition is 45% silver, 25% copper, 30% zinc.The components are melted in a submerged muffle furnace. The finished mixture is poured onto the substrate, after cooling, the alloy is passed through a rolling machine until leaves with a thickness of about 0.5 mm are obtained. When soldering, strips 1-3 mm wide are used, from which pieces of the required length are cut off.

It is not recommended to use formulations containing cadmium at home, as cadmium fumes will cause health problems. During the soldering process, the joint is exposed to atmospheric air. Flux (colophonium) is used to prevent oxidation and other negative reactions. During the melting of the solder, the flux is evenly distributed over the surface of the metal and isolates the welding area.

Soldering techniques: a - soldering an open seam with a hammer soldering iron, b - heating the surfaces to be soldered with an electric iron, c - soldering sheet metal, d - soldering wires, e - soldering pipes with an end soldering iron, e - method of sealing holes in pipes, g - tinning the ends of the wire .

At home, you can use a simple flux for soldering silver alloys - a mixture of equal parts of borax (sodium tetraborate) and potash. Potash can be replaced with baking soda or technical soda. Sometimes 1/10 of table salt is added. Borax is represented by an aqueous solution, and it needs to be dried. It is dried on the burner of a kitchen stove in a vessel such as a porcelain chemical container or an evaporation cup. Drying on low heat.

Hot borax forms bubbles that are pierced with a metal rod to destroy, the mass must remain in the container. After the end of the evaporation process, the borax is immediately removed from the heat to prevent melting. After cooling, the resulting crystals are ground in a mortar and mixed with potash.

After soldering is completed, the flux is removed from the surface of the repaired product using a heated, weak acid solution. For blackening, a hot solution of sulfuric liver is used. Sulfur liver - a mixture of sodium or potassium polysulfides, is made by fusing potash or soda (two measures) with sulfur (one measure). Ready sulfuric liver should be stored in an airtight dry container, a solution is prepared immediately before use, as it retains its properties for 24 hours. The saturation of the solution depends on the desired result and is selected individually.

A gas burner is used to connect small jewelry pieces. Such certainty when choosing the main tool is connected, first of all, with convenience: to work with a gas burner, you only need an ordinary gas cartridge, and the quality of the work performed will please.

Solders for jewelry.

  • insulating refractory base (brick or asbestos plate);
  • silver solder;
  • flux;
  • pickling acid solution;
  • sulfuric liver;
  • small brush;
  • wire cutters;
  • tweezers;
  • gas-burner;
  • copper tongs;
  • clean cloth.

Parts intended for soldering are placed on a refractory base. All elements must be rigidly fixed relative to each other. Clamps of various designs and refractory wire (nichrome) are used. Please note: the smaller the gaps in the welding zone, the more beautiful and high-quality the connection will be.

The working surface of the parts to be soldered is thoroughly cleaned, the oxide films formed over a long time are removed. Pay attention to the complete absence of contaminating components - this is the only way to achieve a high-quality internal connection. Degreased elements are covered with a thin layer of flux. The flux can simply be poured or just before soldering, prepare the required amount of slurry with water. The gruel is applied with a brush.

Gas burner for soldering metals: 1 - inner tube, 2 - outer tube, 3 - hole, 4 - star, 5 - process.

Soldering. A piece of solder is placed at the welding site. The amount of solder is determined locally, it is convenient to use pieces of 2x2 or 2x1 mm.A strip of solder approximately 0.5 mm thick is divided into pieces of the required size. Nippers or side cutters are used.

The gas burner is supplied to the product from the side. Carefully warm up the welding area. Make sure that the flow of hot gas does not blow off the solder and flux, also control the uniformity of heating. After the flux melts, the flame gradually increases until the solder forms a solder joint. If there is not enough solder, carefully add solder and flux.

If a crack needs to be filled, "light" silver solder with a reduced silver content can be used, as it melts at a lower temperature. To join two pieces together, respectively, use "medium" or "hard" silver solder with a higher silver content to create a stronger bond.

Final processing. The product is free of flux. Excess solder is removed with sandpaper or a needle file. The surface is blackened or lightened with an acid solution.

In some cases, they try to solder silver with tin-lead solder. This method can be used only once in a critical situation; when re-repairing, the elegance of the thing may be lost: under such circumstances, the product will simply burn out, and the master will not be to blame for this.

Be sure to tell your jeweler about the use of silver-free solder for repairs.

You need to know that soldering electronic printed circuit boards with your own hands is fundamentally different from repairing jewelry. For soldering, a soldering iron with a thin tip is used. Work in this case is performed by POS-60 solder, melting at a temperature of 180ºС. Thus, you should first take care of the presence of solder for soldering electronic circuit boards. A similar tinol is produced in the form of thin tubes filled with resin. The resin in the solder, in turn, acts as a flux, protecting the metal surface from oxidation.

Read also:  Do-it-yourself Indesit washing machine board repair

When working from home, follow the safety rules. An open flame from a burner can cause a fire. When solder and flux are heated, toxic substances are released, your home must be equipped with a ventilation system. The acidic solution causes chemical burns to the skin and respiratory tract. Be careful.

Silver for a long time was considered a practically useless metal that did not affect the development of progress and technical improvement. However, even in ancient times, silver was actively used for soldering. Soldering silver is an actual procedure in our time, as many of us have certain jewelry made of useful precious metal: a ring, a chain, a ring, earrings, etc.

The temperature at which silver begins to melt is 960 degrees. C, is not high enough for the melting temperature of the metal. For example, the temperature at which copper and gold begin to melt is 1083 gr. C and 1063 gr. C respectively. Of course, there is no point in drawing parallels, comparing with other metals, since the range of metals in such ancient times was quite small.

Many of us, while studying at technical educational institutions, took the subject of materials science. Having opened a modern reference book on materials science, we can personally verify that it contains several silver solders: PSr-25, PSr-10, PSr-12. Solder markings contain letters and numbers, where the latter indicate the percentage of silver in the solder.

In engineering, silver solders have a special place, because silver-soldered seams come out incredibly strong, dense, and resistant to corrosion. The last quality is the most important.Of course, no one even thinks of soldering household items (buckets, dishes) with silver solder, however, some household items, without which it is very difficult to do today, simply need the presence of solders of this kind. Separately, we consider the PSr-12 alloy used for soldering pipes, manifolds, fittings, as well as other equipment with a copper content of more than 58%.

The higher the requirements for strength, resistance to corrosion, the more significant the silver content in the solder. It is worth noting that in some cases soldering with solder with 70% silver content is required. It is interesting to know that the soldering of a material such as titanium forces the use of the purest silver, without any impurities of zinc.

Soft zinc-silver solder is used as an alternative to tin solder. For many, this is absurd, since the solder is being replaced by currency metal. But there is essentially nothing to be surprised here, since this issue is purely monetary.

In our time, POS-40 solder remains the most popular, which includes 40% tin and 60% lead. Solder is used almost everywhere where soldering is required. For comparison, let's say that the POS-40 substitute contains only 2.5% silver in its composition, while the remaining share is lead.

The importance of silver as a material for soldering is steadily growing in our time, mostly in the technical field, as evidenced by published data, according to which, in the USA alone, up to 840 tons of silver are spent annually for this purpose (soldering).

Soldering the metal in question in the conditions of your life is a useful experience that may come in handy in the future. Soldering is the creation of an integral connection of metal elements made of silver using a fusible material (the melting point of the latter is significantly lower than that of the base material).

The technological part of the procedure may differ depending on the type of metal, soldering conditions, as well as many other factors, listing which in full is impractical. Thus, do-it-yourself soldering of electronic printed circuit boards and repairing jewelry can differ significantly.

You can entrust the decoration as a professional, or take up the work yourself, with your own hands. However, this will require curbing some useful information, as well as being informed about the established procedure if you are seriously interested in soldering.

Materials, tools necessary for work:

  • Electric soldering iron;
  • Solder;
  • Flux (colophonium).