ACID TEST FOR PLASTIC‐COATED STEEL: Fan Ducting Endures H2SO4 Fumes

One of the difficulties the producer of a new corrosion‐resistant material has to overcome are invariably the questions, ‘Yes, but how has it stood up to these or those conditions, and who else is using it?’ When the material or product really is new, then it is impossible to answer to the questioner's satisfaction, and assurances are not enough. This is particularly true of the U.K. Abroad, the desire is more apparent to be first to use a new product and this often results in advantages. The more cautious are best persuaded by example.