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2. Galvanic series - Wikipedia

   en.wikipedia.org/wiki/Galvanic_series

   The unshaded bars indicate the location on the chart of those steels when in acidic/stagnant water ( like in the bilge ), where crevice-corrosion happens. Notice how the *same* steel has much different galvanic-series location, depending on the electrolyte it's in, making prevention of corrosion .. more difficult.

3. Glass-to-metal seal - Wikipedia

   en.wikipedia.org/wiki/Glass-to-metal_seal

   Glass-to-metal seals are a type of mechanical seal which joins glass and metal surfaces. They are very important elements in the construction of vacuum tubes , electric discharge tubes , incandescent light bulbs , glass-encapsulated semiconductor diodes , reed switches , glass windows in metal cases, and metal or ceramic packages of electronic ...

4. Graphite - Wikipedia

   en.wikipedia.org/wiki/Graphite

   The expanded graphite can be used to make graphite foil or used directly as a "hot top" compound to insulate molten metal in a ladle or red-hot steel ingots and decrease heat loss, or as firestops fitted around a fire door or in sheet metal collars surrounding plastic pipe (during a fire, the graphite expands and chars to resist fire ...

5. Compacted graphite iron - Wikipedia

   en.wikipedia.org/wiki/Compacted_graphite_iron

   GJV at a magnification of 100:1. Compacted graphite iron (CGI), also known as vermicular graphite iron (GJV, VG, [1] JV [2] or GGV from the German: "Gusseisen mit Vermiculargraphit" [3]) especially in non-English speaking countries, [4] is a metal which is gaining popularity in applications that require either greater strength, or lower weight than cast iron.

6. Metal roof - Wikipedia

   en.wikipedia.org/wiki/Metal_roof

   A metal roof is a roofing system featuring metal pieces or tiles exhibiting corrosion resistance, impermeability to water, and long life. It is a component of the building envelope . The metal pieces may be a covering on a structural, non-waterproof roof, or they could be self-supporting sheets.

7. Annealed pyrolytic graphite - Wikipedia

   en.wikipedia.org/wiki/Annealed_pyrolytic_graphite

   Annealed Pyrolytic Graphite (APG), also known as Thermally Annealed Pyrolytic Graphite (TPG), [1] is a form of synthetic graphite that offers excellent in-plane thermal conductivity. As with pyrolytic carbon or pyrolytic graphite (PG), APG is also low in mass, is electrically conductive , and offers diamagnetic properties that allow it to ...