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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Comparing the effectiveness of Parkerizing versus Coslettizing treatments for exhaust pipes.

Identifier  ExFiles\Box 31\1\  Scan007
Date  6th January 1932
  
LID{A. J. Lidsey}
Repair Dept.
c.Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}
81392
BY/EM8/J.6.1.32.
RECEIVED 1932 JAN

Exhaust Pipes.

We have received a note from the Experimental Dept. with regard to sets of exhaust pipes which they sent away to be treated by the Parkerizing process.

This process does not appear to be so satisfactory as Coslettizing.

The Experimental Dept. point out however that they are looking to the Repair Dept. to obtain some data with regard to the value of the Coslettizing process as a protection for our exhaust pipes.

We take it that it is clearly understood that we must fit Coslettized pipes on all chassis where the exhaust system has failed in customers' hands due to corrosion.

BY/EM.
  
  


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