WSSP - The maintenance of the 411 b series bimetallic thermometer

(1) problem description of pointer thermometer, and three hours of electrolyte, electrolytic cell of chromium plating with a titanium tube 1 protection tube bimetallic thermometer is not moving, I run 120 °? Corrosion of bimetal strip temperature, surface does not make the cold and hot plating chromium heat treatment is hard to know. (2) to analyze problems of titanium is difficult to precious metal corrosion, electrolysis, this kind of phenomenon is very obvious reason is that the purity of titanium is not enough. However, in the market to buy a bimetallic thermometer protecting tube high purity titanium is relatively difficult, high cost. (3) solutions and corrosion resistance, titanium is the jacket or protection pipe of electrolytic protection is difficult, what material? Mild steel and pure iron (4) application of plastic piping, the effect is visible, plastic pipe corrosion resistance is better than that of pure iron, mild steel at 120 ℃, good heat insulation, light weight, cheap, resistant. Bimetallic thermometer find plastic pipe inner diameter 12 mm, this is 12 mm. 510 mm long, so, at the other end of the hot pressing adhesive plastic pipe 500 mm under protection. The mercury thermometer with the thermal inertia of about 10 seconds of the water bath, plating temperature changes, to slow due to changes in the temperature of the electrolytic cell, compared to global warming, a measure of the thermal inertia is negligible.