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Composition of the alloy of Rose and the field of its application

Alloy Rose is created by mixing bismuth(50.0 ± 0.5%), tin (18.0 ± 0.5%) and lead (32.0 ± 0.5%). This alloy is sold in the form of a silvery granule-pellet. According to the technical characteristics, the Rose alloy resembles Wood's alloy, only it is less toxic due to the lack of cadmium in its composition (12.5% ​​in Wood alloy). The melting point of this mixture of metals is only 94-96 ° C, so it is very convenient to use them. Many radio engineers have found use of the Rose alloy in the tinning of the copper surface of the etched board. In addition to the mixture of metals, a suitable container, cotton balls or disks, citric acid and two wooden sticks are also used in this work. Due to its physical properties, the Rose alloy is used in electrical fuses, laboratories for semiconductor technology with overheating sensitive parts and in radio engineering as solder PVSV 50. In addition, the alloy is used for soldering silver-plated parts in assembly joints, aluminum, aluminum and copper and its alloys. Rose is also used for tinning bronze, brass, copper, copper-nickel alloys with silvered ceramics, nickel and jewelry.

How to Tin a Rose Alloy PCB

Very often, the Rose alloy is used for tinningPCB at home. There is it as follows. Take a container where the tinning will take place, and pour half a glass of water in it, put it on the fire. When the water is slightly warm, pour a teaspoon of citric acid into it and stir. Put a PCB in the tank. When the board turns pink, put several pieces of the Rose alloy on the side covered with a metal foil directly into the container. Wait until it melts. When Rose becomes liquid, wooden sticks with a wrapped cloth or cotton-wool ends, spread it over the textolite. If the pieces have slipped from the board, you can quickly return them to their seats with chopsticks or turn the board over and press the foil to the alloy. Remove excess metal can be the same chopsticks, easy movements erasing the Rose from the foil. Remove the prepared board from the container and allow it to cool.

How to handle Rose alloy

Alloy Rosa is transported by the usual standard,developed for the transport of metals. Rose can be transported both in the car and by any rail. The alloy is stored both in closed warehouses, and in the open air, but in carefully packaged containers. The alloy of Rose is not too toxic, but we should not forget that its composition includes heavy metals. It is undesirable to work with him for too long.