Welder at workMMA (manual metal arc welding) is a very popular method of making welded joints. It is also one of the least complicated, yet most cost-effective methods of its kind. Welding activities in outdoor areas are often carried out using MMA, thanks to the possibility of using mobile equipment. The versatility of MMA is also due to its use for joining e.g. steel, cast iron and, less frequently, non-ferrous metals and their alloys, e.g. copper, nickel, aluminium. What else is there to know about welding with this method? 

 

MMA basics

The MMA welding technique is also known by other names: method 111 and covered electrode welding. The latter name is a reference to the use of a specific accessory in the process of joining materials. This is an electrode, consisting of a core (metallic element) and a special coating (covering mass, of various chemical compositions). The electrode generates an electric arc between it and the materials to be joined. During this time, under the influence of heat energy, at a very high temperature, the lagging melts, releasing gas vapours and slag. Their function is mainly to protect the welded joint from the atmosphere and from the materials solidifying too quickly.

 

MMA, and TIG, MIG, MAG

The key difference between MMA and TIG, MIG, MAG is the length of the electrode. With MMA, its length is subject to shortening, so that the electrode holder remains at a variable distance from the workpiece. Therefore, it is necessary to maintain a constant distance between the weld pool (molten layer of material) and the electrode itself. Such a skill requires both knowledge of things and practical training. If you would like to gain advanced knowledge of welding techniques, come to our UDT training at ERGON.

Lagging electrode

 

Safety and security

Welding safety is based on the prevention of burns to the eyes, skin and hair and of fume poisoning, as well as preventing the occurrence of fire. It must be remembered that the electrode arc is not shielded and, therefore, safety measures such as dedicated visors, protective shields and specialised gloves must be implemented. Protective shields can be used to protect the environment and air ventilation control solutions can be implemented.

 

How to acquire the skills and qualifications of a welder

ERGON is a professional training centre that has been on the market continuously for several years. During this time, we have met the expectations of many trainees who, after completing their training and certification, have been equipped with sound knowledge and skills and have acquired entitlementsessential to their work. We offer courses and UDT training to train you or your employees in the trade. We look forward to seeing you at a training course. If you have any questions or concerns, our consultants are at your disposal.

 

Welding station