In armoured thermocouple for different types of coatings. Some are as follows: metal thermowells with tungsten carbide/ceramic/PTFE/PVDF/PFA coating.
1, tungsten carbide coating thickness: 0. 5 - 1. 0 mm: temperature lower than 650 oc
work features: tungsten carbide coating provide effective wear-resisting coating, because it has a very high hardness, Up to 74 HRC hardness) 。 Its high temperature resistance, corrosion resistance, high wear resistance.
2, teflon coating thickness: 0. 5 - 1. 0 mm temperature: 200 oc
work features: teflon coating dry film lubricant, can provide excellent corrosion resistance and chemical resistance.
3, boron nitride coating thickness: 0. 5 mm temperature: 900 oc
work features: boron nitride can protect with molten metal ( Especially the aluminum) The surface of the contact. Boron nitride inhibits corrosion and chemical erosion, and provide the easier to release and longer service life.
4, zirconia coating thickness: 0. 5 - 0. 1 mm temperature: 1800 oc
work features: zirconia coating can produce hard and resistance to chemical corrosion protective layer, suitable for high temperature and corrosion.
5, alumina coating thickness: 0. 5 - 1. 0 mm temperature: 1200 & deg; C
work features: alumina coating with high temperature abrasion protection.
6, division too set coating thickness: 0. 5 - 1. 0 mm temperature: 1200 & deg; C
job characteristics: department too stand coating has very good abrasion resistance and good resistance to chemical corrosion.
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