Metal surface treatment

Ultra Clean cleaning (Oxygen clean)

Extremely clean required

For certain applications, including in the petrochemical industry, extremely clean surfaces are required. Consider, for example, systems that work with high percentages of pure oxygen. This application requires that the presence of organic contamination such as oils and grease is kept to an absolute minimum. Particularly at elevated pressure, even the smallest traces can lead to spontaneous ignition. That is why this cleaning process is called UltraClean or oxygen-clean cleaning.

After cleaning, we can determine the residue of organic material by means of a solvent extraction test. We perform this test and reporting according to the ASTM G93-03 standard.

The evaporation residue will be assessed according to the table below (ASTM G93-03).

  • Level A < 1 mg/ft² (11 mg/m²)
  • Level B < 3 mg/ft² (33 mg/m²)
  • Level C < 6 mg/ft² (66 mg/m²)
  • Level D < 20 mg/ft² (220 mg/m²)
  • Level E < 50 mg/ft² (550 mg/m²)
  • Level F Specified by the user or supplier of the parts.

Various metals

Vecom has many years of experience in cleaning various metals for oxygen applications such as stainless steel, carbon steel, aluminum and chromium or copper alloys.

Various methods

Depending on the types of metal used and the contamination to be removed, cleaning is carried out in one or more steps with alkaline, neutral or acidic chemical agents. Here, the metal surface treatment often includes not only degreasing, but also other treatments such as pickling, passivating and phosphating.

Final inspection

In addition to the cleaning procedure, the final inspection of treated material is also essential. The final inspection takes place by means of UV light, a wipe test or an evaporation test with chemically pure solvents to ensure removal of organic contamination.

 

Metal surface treatment

Degreasing

To be able to perform a good pickling treatment, the material must first be degreased so that the pickling agent can pickle the entire stainless steel surface homogeneously.

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Pickling and Passivating

Pickling and passivation removes welding discoloration, annealing skin, foreign iron, restores corrosion resistance and brings it back to the original level of the base material.

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Water jetting

The smoothest, homogeneous metal surface. Chemical-free for the food, medical, pharmaceutical, chemical and cosmetic industry.

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Ultrasonic cleaning

Quickly and effectively removes stubborn contamination down to the smallest seams. Extremely suitable for cleaning fuel and oil filters, cylinder heads and air coolers.

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Coolers, filters & heat exchangers

Vecom has various cleaning types for cleaning coolers, filters and heat exchangers. Determining the suitable process requires experience and expertise.

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Electropolishing

For a glossy surface with optimally low Ra values. Less sensitive to dirt adhesion and maximum cleanability.

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Contact us

For more information or questions, contact one of our specialists.