Flash corrosion

Flash corrosion

What is Flash corrosion?

Flash corrosion occurs on steel after a few minutes to a few hours after cleaning is done. Often with the use of Ultra high-pressure water jetting (UHPWJ). Flash corrosion occurs quickly, especially when water films reside on the steel surface, as it often does with conventional UHPWJ.

Corrosionpedia has a more detailed explanation here.↵

Ultra-high pressure water jetting advantages and disadvantages


  • Removes salt and rust in one step.
  • No dust is produced.
  • No grid cost. (As compared to blasting)


  • Flash rusting.
  • Expensive and very heavy equipment.
  • Less efficient compared to competitors.
  • No surface roughness as it will only reveal the existing anchor pattern.
  • Water quality and availability.
  • Water freezes below 0°C.
  • Specially trained personnel.
  • Special PPE requirements.
  • Mandatory resting and breaks.

The alternative tools for avoiding Flash corrosion

Non-sparking cold working tools from Safety Tools Allmet provide many HSE benefits such as;

  • No hot sparks. It does not damage the substrate and underlying paint/coating.
  • Ex certified for use in zone 1 & 2No Hot work permits. Certified by DNV and it is classified as a Cold Working Tool.
  • Low heat. Heat varies from 30 ℃ to 60 ℃ for grinding on steel. You can immediately place your hand on the steel, even after a long period of grinding.
  • Low vibration. Tested and approved for use over a normal workday. 7.5 hours

When you use the cold working tools, the only requirement is standard PPE.

Safety Tools Allmet
0500 grinding disc in action 2

For the above pointers. There is no requirement for the use of habitats or fireguards. No need to covering of expensive equipment nearby. It is possible to work near your colleagues, improving productivity.

Our “Cool” technology is used in many sectors, including the oil and gas industry, the petrochemical industry, steel construction, and shipbuilding. As well as during maintenance work on bridges, offshore installations, and wind turbines.