MIL-STD-889D

What is MIL-STD-889D?

The MIL-STD-889D is a standard practice document for handling the galvanic compatibility of electrically conductive materials published by the Department of Defense (DoD).¹

The MIL-STD-889D specification can be downloaded for free here, alternatively our free tool provides a simple user interface for comparing material pairs.

The MIL-STD-889D Table

Corrdesa provides a free public tool for users to quickly compare materials in a table format rather than using the mileage chart provided in the MIL-STD-889D documentation.

The feature is free to all users and can be accessed here: https://corrosiondjinn.com/MIL-STD-889D/

MIL-STD-889D

The table shows all possible material combinations that are present in MIL-STD-889D, showing the anodic and cathodic members in each pair, the MIL-STD-889D rating, and Corrosion Rate in \(\mu\text{py}\) (Microns Per Year) and \(\text{mpy}\) (Mils Penetration Per Year), as can be seen in Figure 1.

Filtering & Sorting

It is possible to filter the material pairs to reduce number of entries in the table, this allows the user to choose a 'primary' material and then see possible combinations that are related to the chosen material. In addition to filtering you can also sort the data on the following columns; Materials, MIL-STD-889D Rating, Corrosion Rate \(\mu\text{py}\) (Microns Per Year), and Corrosion Rate in \(\text{mpy}\) (Mils Penetration Per Year).

An example of filtering data can be seen in Figure 2 where Material One is filtered to Aluminum & Aluminum 2024-T3, with sorted results shown in Figure 3 this table is sorted to highest Corrosion Rate in \(\mu\text{py}\) (Microns Per Year).

References