Zeroing In on High-Purity Gases for Mexico Laser Welding


Lasers were originally hypothesized by – wouldn't you know it – Albert Einstein at the dawn of the 20th century. It wasn’t until the 1980s, though, that lasers were employed to solder lead in electronic component circuit boards. And it wasn’t until 2002 that CO2 lasers were applied to weld polymers. These days, AOC Mexico S.A. de C.V., one of better than 150 PurityPlus® Partners at 600 locations across the country, is happy to be a trusted Mexico provider of the high-purity specialty gases so important to the gas laser welding process. Our key customers are considerably automated high-volume manufacturers. Those associated with the automotive industry are maybe the most conspicuous exemplars of such.

A few gas laser basics:

  • Resonator gases are most often a combination of helium (He), carbon dioxide (CO2), and nitrogen (N2). The active gas that in fact engenders the laser light itself – infrared radiation – is CO2.
  • Shielding gases safeguard the weld area from oxygen and water vapor, which helps boost the speed and quality of the welding process. Argon is the most common shielding gas. It’s often mixed with helium, oxygen, or carbon dioxide, which markedly improves its plasma suppression properties.
  • As a resonator gas, ultra-high-purity (99.999%) PurityPlus® helium provides exceptionally high thermal conductivity, the better to conduct heat away from the electric discharge. This makes it amore than suitable choice for really high-powered laser welding.
  • PurityPlus® carbon dioxide, while frequently used on its own to operate CO2 lasers, is better intermixed with helium and nitrogen so as to achieve the very high laser powers needed for laser cutting and welding.
  • PurityPlus® nitrogen, particularly as an intermediary with CO2, is also helpful in obtaining very high laser powers.
  • PurityPlus® argon, an inert gas and thus first-rate as a shielding gas in laser welding, provides total protection against ambient air. Because it normally supports plasma generation, it should not be used for laser powers above 3 kW.

No matter what your particular laser welding application here in Mexico, you can rest easy knowing we have the PurityPlus® specialty gases with the certified high- or ultra-high purity necessary to carry it out. Contact AOC Mexico S.A. de C.V. today.