Scarlet Alkaline Heaters, made of chrome nickel steel tubing are suitable for alkaline environments which corrode mild steel.(Terminal cover provided). Applications : heating of cleaning solutions and detergents. Lead Covered Immersion Heaters can be used wherever the sulphuric acid concentration is up to a maximum of 10%. Applications : nickelchromedull electroplating baths. Chemical Heaters are constructed from titanium tubes and offer excellent degree of corrosion resistance. Applications : heating of corrosive liquids such as nitric and chromic acids.