ISO 4404-1:2012

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Petroleum and related products — Determination of the corrosion resistance of fire-resistant hydraulic fluids — Part 1: Water-containing fluids

ISO 4404-1:2012 is an international standard that specifies a test method to determine the corrosion resistance of "water-containing" fire-resistant hydraulic fluids, essentially evaluating how these fluids affect metal components in hydraulic systems, categorized under HFA, HFB, and HFC classifications as defined in ISO 6743-4; it is used to assess the corrosion protection provided by these fluids within hydraulic systems.