Development of tubular coated electrodes for underwater wet welding.

• Alexandre Queiroz Bracarense Universidad Federal de Minas Gerais-Brasil
• Lorenzo Perdomo González Universidad Central “Marta Abreu” de Las Villas-Cuba
• Ezequiel Caires Pereira Pessoa Centro Federal de Educa í§ ío Tecnológica de Ouro Preto, UNED-Congonhas-Brasil
• Rafael Quintana Puchol Universidad Central “Marta Abreu” de Las Villas-Cuba

Abstract

The structural configuration of the tubular coated electrodes offers an attractive field of metallurgical and technological investigation on the underwater wet welding. For this reason, in this work the developed experiments with tubular coated electrodes using as base the covering of the rutile electrode (6013) are presented. Three different powder mixtures were formulated and filled the tubular wires cavities. Finally two electrodes were selected and the waterproof varnish with pirometallugical mixtures was modified. The deposits were made in an aquarium with a water layer of 1m. The obtained results revealed that the mixture formed by manganese oxide and aluminum as inside the electrode as in the waterproof varnish offered the best results in the technological and metallurgical behaviors of the underwater wet welding, showing that the tubular coated electrodes constitute a viable alternative for the development of consumable for the wet welding process.