17-05-2014, 10:28 AM
Soldering Safety Tips
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Soldering is the essential part of circuit construction. Soldering is the process by which two metal parts are joined together using a metal alloy. The metal alloy used in soldering is the mixture of lead and tin. To make the solder evenly spread over the joints, soldering flux is applied which removes the oxidation remnants in the metal joints and makes the contact firm. The flux also reduces the melting point of lead for easy melting. Soldering process requires proper care to avoid hazardous situations. The following are some possible hazards during soldering and the tips to avoid them.
Shock hazard
Soldering iron is an AC device used for heating the iron tip. There is a heating element in the iron which heat up when current passes. To connect the soldering iron, a three pin socket with proper earth connection is a must. Check the metal part of the iron using an AC tester for any leakage before using. Also periodically check, the plug, cord etc for any insulation break. Always wear a rubber foot wear during the soldering work. It is better to place a rubber sheet on the floor of the work room so that the feet will rest on it during the work.
Skin Burning
Soldering iron becomes too hot when it is connected to mains. Avoid touching it with the body parts to prevent burning. The molten lead also causes burning injury. It is better to wear a spectacle during soldering to protect the eyes because sometimes the solder bubble may explode and there is chance for falling into the eyes.
Health Hazards
The lead and the flux used for soldering contain toxic materials which will come out in the form of fumes and gases. When heated, the soldering lead will emit lead oxide which is highly toxic if inhaled in excess. Once entered into the body, it will be absorbed through the mucous membrane of lungs, stomach and then enters into the blood stream. Symptoms of lead poisoning include loss of appetite, indigestion, nausea, vomiting, constipation, headache, abdominal cramps, nervousness, insomnia etc.