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Category Archives: Chemistry and Materials FAQs
FAQ; High Performance Greases and Lubricants
When working with aggressive chemicals, the use of greases is often highly restricted (or prohibited) and we are often asked what we use. In working with liquid oxidisers (nitrogen tetroxide, nitric acid and hydrogen fluoride), we have generally found that … Continue reading
In terms of Corrosion, what’s the difference between a ‘Passivator’ and an ‘Inhibitor’?
Metals are said to be ‘passive’ when they show good corrosion resistance against a specific medium. That is to say that metal A might be passive in liquid 1 but not in liquid 2, whereas metal B might be passive … Continue reading
Posted in Chemistry and Materials FAQs
Tagged corrosion, inhibitor, passivator
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Fracking? Not in Our back yard!
I am a person who has been involved with matters of a chemical nature for over 40 years now. I have a BSc and PhD in chemistry. I was elected as a Chartered Chemist and a Chartered Engineer and I … Continue reading
Posted in Chemistry and Materials FAQs
Tagged fracking, United Kingdom
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How can you tell if chemical analyses are dependable
The question sometimes arises about how a client can be totally confident about the services supplied by a chemical analyst. This is very fair question and one that we ourselves need to consider if we outsource particular tests for which … Continue reading
Posted in Chemistry and Materials FAQs
Tagged chemical analysis
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Why were some halocarbons solvents banned but some are still in use?
The solvents that were banned were the ones that were chemically very stable and survived for very long periods of time in the atmosphere. These materials eventually travelled to the ozone layer and were involved in photochemical reactions which destroyed … Continue reading
Posted in Chemistry and Materials FAQs
Tagged halocarbons, Montreal, ozone, ozone depletion, solvents
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How Dangerous are the Hydrazine Fuels?
Just how dangerous are the Hydrazine Fuels? The hydrazine fuels (anhydrous hydrazine and mono-methylhydrazine MMH) are currently going through close scrutiny in Europe because of the new ‘REACH’ legislation. Consequently, the question of their toxicity is a hot subject. Having … Continue reading
Posted in Chemistry and Materials FAQs, Fuels, Space
Tagged ADN, exposure, Fuel, HAN, hydrazine, MMH, monomethylhydrazine, non-toxic, propellant, REACH, toxicity
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FAQ; Are there any chemicals which can be used to strip enamel from copper wire?
Answer; we think that the only chemicals which work are rather dangerous. We have started to use self-fluxing wire which does not require the enamel to be removed; you simply apply a hot iron and the coating disappears. You can … Continue reading
Posted in Chemistry and Materials FAQs
Tagged enamel wire
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FAQ; High Performance Greases/Lubricants
When working with aggressive chemicals, the use of greases is often highly restricted (or prohibited) and we are often asked what we use. In working with liquid oxidisers (nitrogen tetroxide, nitric acid and hydrogen fluoride), we have generally found that … Continue reading
Posted in Automotive, Chemistry and Materials FAQs, Corrosion
Tagged fluorocarbon, Fomblin, grease, Rocol, RT15
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