Welding electrodes - Import export

Surfacing electrodes for diverse demands acc. to hardness, toughness, type of stress, machina

Dr. Paul Lohmann® offers Dipotassium Oxalate 1-hydrate as fine powder and as crystals in chem. pure. In the oral care sector, it is used for pain desensitization. For industrial applications, it is used as a potassium source for plasma welding electrodes, complexing and precipitating agents for metals and for the preparation and modification of catalyst surfaces. CAS 6487-48-5 EINECS 209-506-8 Dr. Paul Lohmann® carries out product and application development in close cooperation with customers. This includes the adaptation of chemical and physical parameters such as bulk density, wettability, particle size, purity or pH-value.

Tungsten is a silver-white, metallically shiny or grey heavy metal (depending on whether it occurs in pieces or in powder form). Hard and brittle, tungsten can, however, be made ductile by hammering and drawn into thin wires, for example. Tungsten belongs to the group of refractory metals, which are characterized by high melting points, good thermal conductivity and low thermal expansion, among other things. High corrosion resistance is a further characteristic. Tungsten is suitable for the construction of resistance heating elements, the manufacture of filaments (especially in high-temperature furnace construction and electrical engineering), engine parts, X-ray anodes and welding electrodes. Pins made of tungsten can be fused into high melting point glass for the passage of current. Tungsten is also used in nuclear technology. Tungsten alloys are used about 80% in the steel industry and about 10% each in the hard metal and electrical industries.

Tungsten inert gas (TIG) welding offers many advantages over other fusion welding methods, such as the complete absence of spatter and low welding-fume emissions. Since TIG welding uses a non-consumable electrode, the process is ideal for welding so-called root passes or in forced positions due to the decoupling of current and welding consumables.

TIG welding torches, gas- or water-cooled from 150 A (gas-cooled) up to 400 A (water-cooled). — TIG welding torch with a highly flexible hose package — Ergonomic GRIP handle for a secure hold and ergonomic use — Excellent HF reliability — Ready to weld with tungsten electrode, gas nozzle and back cap

— Inverter welding machine, DC — Very light-weight, only 4,7 kg – housing made of aluminium and impact-resistant plastic — Portable, shoulder strap — MMA and TIG lift arc welding — Cellulose electrodes: 100% safe for vertical-down welding — Welding of stick electrodes up to 4 mm — Pulsed MMA welding: — Especially suitable for root welding — Outstanding gap bridging with no sagging of the root side — Fine-flaked weld surface with a TIG look for final passes — Less finishing work thanks to less spatter — Ideal for difficult electrodes — Less distortion thanks to controlled heat input — Pulsed TIG welding with up to 2 kHz — Connection capability for remote control — IP23 spray water protected — Arcforce, hot start, antistick — Energy efficient due to standby mode — 3.5 m mains lead with 16 A earthed plug — Overvoltage protection: No damage to machine caused if inadvertently connected to 400-V mains voltage

The rutile-basic-coated special-purpose electrode has a non-conductive and water-repellent coating for manual wet underwater welding. It is suited for assembly and repair welding in up to 20 m water depth for offshore and harbour construction, shipbuilding, and steel hydraulic engineering. High-quality welds require appropriate weld preparation, well-trained personnel, and compliance with recognised standards of good practice.