Rechercher

Provides an accelerated means of assessing the effect of tarnishing on silver and silver alloys used for contacts and connections. Is particularly suitable for comparative information, but not as a general corrosion test, i.e. it may not predict the behaviour of contacts and connections in industrial atmospheres. The objects are: a) to determine the influence of atmospheres containing hydrogen…

Applies to all types of industrial-process control valves. Establishes a basic component and functional terminology list and gives guidance on the use of the other parts of this publication. Gives overall design requirements, test requirements and prediction methods.

Covers nominal sizes between 20 mm and 400 mm.

Specifies the treatment of a test portion with an excess of carbonate-free sodium hydoxide solution. Elimination of ammonia by boiling. Precipitation of carbon dioxide by an excess of barium chloride. Neutralization with hydrochloric acid solution using thymolphthalein as indicator. Addition of an excess of standard volumetric hydrochloric solution and back-titration with standard volumetric…

The apparatus required consisting of the essential parts as funnel, calibrated cylindrical receiver and closure plate (to cover the bottom of the funnel), is shown in a figure. The funnel may be constructed of any suitable material, for example, stainless steel, plastics or wood. The test is carried out by determining the mass of the product in the receiver of known dimensions after running the…

Applicable to ash contents equal to or more than 0.0001 % (m/m). The principle consists in heating a test portion at low flame in a well-ventilated fume cupboard. After complete volatilization, heating in a furnace at a temperature of (575 25) °C to constant mass.