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topic 1801

Erosion-corrosion protection


Dear Sir, Any idea how can I protect internal aluminium-bronze (AB2)  valve parts against erosion-corrosion effect under high velocity  water? Is internal cathodic protection possible? Thanks in advance   Izhar B.

Izhar Bahir


Mr. Izhar Bahir,

Are the valve components subject to friction from objects other than the water? What is the CPM rate? I may know of a protective coating that may assist in solving your problem.

Todd Miller
- Oceanside, California


In the Erosion/ Corrosion research center of the University of Tulsa, we are planning to study the erosion behavior of valves in different flow conditions and multiphase flow. We are looking for input from valve manufacturers, valve users and anyone having experience with erosion problem with valves.

PLease send us any information you have regarding the erosion behavior of valves. You can mail the information to me at:

Quamrul H. Mazumder
4408 West Commercial Street
Broken Arrow, OK 74012
U. S. A.

Quamrul H. Mazumder
The University of Tulsa - Tulsa, Oklahoma


We have been able to achieve a considerable decrease in erosion on bronze propellers used in boats by cryogenic processing. Part of the damage these props see is due to cavitation, the rest is do to an increase in abrasion resistance. The advantage of cryogenics over a coating is that cryogenics affects the entire volume of the part where a coating becomes useless once it has been worn away.

F. J. Diekman
- Streamwood, Illinois, USA


We have had various problems with Erosion on valve seats from different manufactures when using Aluminium Bronze (AB2) Especially when controlling at high velocities on valve closure. Do you have any information on this subject or has anybody done any conclusive testing. My main application is on linear Hydraulic control valves in the water industry.

Michael Botha
- Port Elizabeth, South Africa

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