intergranular corrosion

It is visible evidence of intergranular corrosion.

Intergranular corrosion induced by environmental stresses is termed stress corrosion cracking.

Other related kind of intergranular corrosion is termed knifeline attack (KLA).

Some austenitic stainless steels and nickel-based alloys are prone to intergranular corrosion.

Certain alloys when exposed to a temperature characterized as a sensitizing temperature become particularly susceptible to intergranular corrosion.

Die-cast zinc alloys containing aluminum exhibit intergranular corrosion by steam in a marine atmosphere.

Anisotropic alloys, where extrusion or heavy working leads to formation of long, flat grains, are especially prone to intergranular corrosion.

In a corrosive atmosphere, the grain interfaces of these sensitized alloys become very reactive and intergranular corrosion results.

Thus in certain aluminium alloys, small amounts of iron have been shown to segregate in the grain boundaries and cause intergranular corrosion.

Aluminium-based alloys may be sensitive to intergranular corrosion if there are layers of materials acting as anodes between the aluminium-rich crystals.

Several methods have been used to control or minimize the intergranular corrosion of susceptible alloys, particularly of the austenitic stainless steels.

His research focus was on the mechanism of intergranular corrosion of aluminum-copper alloys and on the pitting of metals.

Another control technique for preventing intergranular corrosion involves incorporating strong carbide formers or stabilizing elements such as niobium or titanium in the stainless steels.

Intergranular Corrosion (information scraped from Perry's Chemical Engineers' Handbook, by Don W. Green and James O. Maloney.

Intergranular attack, another term for intergranular corrosion (a form of corrosion where the boundaries of crystallites of the material are more susceptible to corrosion than their insides)

Working through ASTM International he was instrumental in standardizing intergranular corrosion tests, including the ferric sulfate-sulfuric acid test now called the "Streicher Test" in his honor.

Intergranular corrosion is generally considered to be caused by the segregation of impurities at the grain boundaries or by enrichment or depletion of one of the alloying elements in the grain boundary areas.

Sensitization refers to the precipitation of carbides at grain boundaries in a stainless steel or alloy, causing the steel or alloy to be susceptible to intergranular corrosion or intergranular stress corrosion cracking.

In metallurgy, exfoliation corrosion is a form of intergranular corrosion that manifests itself by lifting up the surface grains of a metal by the force of expanding corrosion products occurring at the grain boundaries just below the surface.

High-strength aluminium alloys such as the Duralumin-type alloys (Al-Cu) which depend upon precipitated phases for strengthening are susceptible to intergranular corrosion following sensitization at temperatures of about 120 C. Nickel-rich alloys such as Inconel 600 and Incoloy 800 show similar susceptibility.

Putting aside some of the well known facts about deposit phosphorus vs various properties, i.e. hardness or corrosion resistance that we will cover a bit later, deposits with a high degree of amorphous composition are free of grain boundaries, which typically act as sites for intergranular corrosion commonly encountered in crystalline deposits.