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  2. Intergranular corrosion - Wikipedia

    en.wikipedia.org/wiki/Intergranular_corrosion

    Another related kind of intergranular corrosion is termed knifeline attack (KLA). Knifeline attack impacts steels stabilized by niobium, such as 347 stainless steel. Titanium, niobium, and their carbides dissolve in steel at very high temperatures. At some cooling regimes (depending on the rate of cooling), niobium carbide does not precipitate ...

  3. 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.

  4. Niobium - Wikipedia

    en.wikipedia.org/wiki/Niobium

    Furthermore, it is corrosion-resistant, ... The result is aluminium oxide and ferroniobium, an alloy of iron and niobium used in steel production. [62] [63] ...

  5. Corrosion - Wikipedia

    en.wikipedia.org/wiki/Corrosion

    Galvanic corrosion of an aluminium plate occurred when the plate was connected to a mild steel structural support.. Galvanic corrosion occurs when two different metals have physical or electrical contact with each other and are immersed in a common electrolyte, or when the same metal is exposed to electrolyte with different concentrations.

  6. Galvanic corrosion - Wikipedia

    en.wikipedia.org/wiki/Galvanic_corrosion

    Galvanized mild steel cable ladder with corrosion around stainless steel bolts. All metals can be classified into a galvanic series representing the electrical potential they develop in a given electrolyte against a standard reference electrode. The relative position of two metals on such a series gives a good indication of which metal is more ...

  7. High-strength low-alloy steel - Wikipedia

    en.wikipedia.org/wiki/High-strength_low-alloy_steel

    High-strength low-alloy steel (HSLA) is a type of alloy steel that provides better mechanical properties or greater resistance to corrosion than carbon steel. HSLA steels vary from other steels in that they are not made to meet a specific chemical composition but rather specific mechanical properties.

  8. Group 5 element - Wikipedia

    en.wikipedia.org/wiki/Group_5_element

    Small amounts of niobium are added to stainless steel to improve its quality. Niobium alloys are also used in rocket nozzles because of niobium's high corrosion resistance. [19] Tantalum has four main types of applications.

  9. Niobium alloy - Wikipedia

    en.wikipedia.org/wiki/Niobium_alloy

    Niobium-1% zirconium is used in rocketry and in the nuclear industry. It is regarded as a low-strength alloy. [1] [2]C-103, which is 89% Nb, 10% Hf and 1% Ti, is used for the rocket nozzle of the Apollo service module and the Merlin vacuum [3] engines; it is regarded as a medium-strength alloy.