Metals in Dairy Equipment

copper Ascoloyt Iron Edges bare § Enduro Type "A" § § Nickel Edges tinned** Manganese aluminum Tin Copper Retin$ alloy* Zinc Tinned iron Monel Metal Edges barett Nickel silver Edges tinned$$ Manganese aluminum alloy (aluminum plated)* * Furnished by the Aluminum Company of America.The aluminum is the pure metal in a soft condition.The manganese aluminum alloy consists of 1.25 per cent manganese and the balance aluminum.~f Furnished by the Allegheny Steel Company.Ascoloy is an ordinary chromium steel alloy, containing approximately 12 to 16 per cent Cr, 0.5 per cent Si, 0.5 per cent Mn, 0.025 per cent P, and 0.025 per cent S. Allegheny Metal is a chromium-nickel steel alloy, containing 17 to 20 per cent Cr, 7 to 10 per cent Ni, and less than 0.5 per cent Mn, 0.5 per cent Si, 0.025 per cent P, and 0.025 per cent S.Furnished by the Sorensen Specialty Company.This is copper coated with a tin preparation which can be applied to renew the tinned surface without use of flux.The tin coating was very heavy.The remaining metals were furnished by J. G. Cherry Company.§ Represents copper strips the cut edges of which were not tinned.** Represents copper strips the cut edges of which were tinned.t t Represents iron strips the cut edges of which were not tinned.~ Represents iron strips the cut edges of which were tinned.§ § Enduro Type "A" is an ordinary or straight chromium steel containing 16.5 to 18.5 per cent Cr, 0.5 to 1.25 per cent Si; and less than 0.1 per cent C, 0.5 per cent Mn, 0.03 per cent S, 0.03 per cent P, and 0.25 per cent Ni.Since completing this work our attention was called to other Enduro products, such as Enduro 18-8, a chromium-nickel steel.The present experiment refers to Enduro Type 'cA" only. Liquids used.The liquids used consisted of suitable solutions of such dairy washing powders as special alkali, sodium carbonate, Wyandotte, tri-sodium phosphate, Tin Cleaner, Diversol, and sodium hydroxide; of chemical sterilizers such as sodium hypochlorite, Diversol, and chloramine-T; of neutralizing lime; and of refrigerating brines, both calcium chloride and sodium chloride, variously treated for protection against corrosion.Appearance of metal strips after immersion in washing partial immersion powder solutions; METALS HYDR0XlDm .