david@bcmetalfinishing.co.uk

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SEM Testing

An SEM is essentially a high magnification microscope, which uses a focused scanned electron beam to produce images of the sample, both top-down and, with the necessary sample preparation, cross-sections. The primary electron beam interacts with the sample in a number of key ways:- Primary electrons generate low energy secondary electrons, which tend to emphasise the topographic nature of the specimen Primary electrons can be backscattered which produces images with a high degree of atomic number (Z) contrast Ionized atoms can relax by electron shell-to-shell transitions, which lead to either X-ray emission or Auger electron ejection. The X-rays emitted are characteristic of the elements in the top few µm of the sample.

For more information call David on 07590 452588 or email us.


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BC Metal Finishing

Phosphate Pretreatment Chemicals

A range of Phosguard products including manganese, zinc, zirconium and lightweight iron phosphate process which improve the corrosion resistance and adhesion when followed by paint or powder coatings.

BC Metal Finishing

Nano Treatments

These nano treatments or can we say Oxsilan replace the conventional lightweight iron and zinc phosphates. They are used on steel, zinc and aluminium substrates at room temperature and produce little or no sludge giving excellent adhesion and corrosion resistance.

BC Metal Finishing

Chrome Free Coatings

Phosguard NC 304 is a chrome free dry in place pretreatment for aluminium which can be made up in town’s water does not require post rinsing.