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General Materials Forum: bronze, stainless, and aluminum in liquid oxygen (lox)

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    Does anyone know much about these materials in a lox (liquid oxygen) atmosphere? I work at NASA and I'm trying to get some outside info. We are currently having some issues with our lox pumps. They are typical centrifugal side suction and top discharge pumps. Our current arrangement has a cast aluminum case, cast stainless steel impeller, and stainless steel shaft. There has been some talk about going to bronze impellers.
    1. From a materials viewpoint, are there any advantages/disadvantages for using a bronze impeller in lox?
    2. Is the current setup a good configuration with the aluminum case and stainless impeller in a lox pump?
    3. Are there any other concerns with anything related to this situation?

    Any info is great. Thanks.
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    can I get some explanation about aluminium alloy. ??

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