Corrosion Behavior

Corrosion and Corrosion Properties of Stainless Steels: Part Three

Intergranular corrosion, also called intercrystalline corrosion, occurs on or adjacent to the grain boundaries of a metal. It is caused by microsegregation of impurities and alloying elements on the grain boundaries.
The driving force of intergranular corrosion is the difference between the electrode potentials of the grain boundary and the grain itself, which form a galvanic cell in presence of an electrolyte.

Corrosion and Corrosion Properties of Stainless Steels: Part Two

Like all metals and alloys that relay on a passive film for corrosion resistance, stainless steels are susceptible to localized corrosion, i.e. pitting or crevice corrosion. Both these types of corrosion usually occur in chloride-containing aqueous solutions such as sea water, but can also take place in environments containing other halogenides.

Corrosion Behavior of Aluminum in Chloride Mediums

This study investigates the corrosion resistance of aluminum alloys (AlMn and sandwich material AlSi/AlMn/AlSi) in chloride-containing environments using electrochemical techniques. The research examines how varying chloride concentrations (100, 300, and 500 ppm) affect the polarization resistance of these materials over time. Results demonstrate that both alloys exhibit good corrosion resistance in Glaceol RX D cooling liquid, even with chloride additions.

Corrosion Behaviour of Copper Alloys: Part One

Copper demonstrates excellent corrosion resistance in marine environments as well as showing strong abilities to withstand several other key localized corrosion forms which could potentially lead to failure.
Commonly weathered copper will go through a range of visual appearance transformations including the development of a brown patina within a few days of exposure and this will develop into the recognized green color over a period of 7-9 years.

Corrosion Behaviour of Copper Alloys: Part Two

Copper and copper alloys are specific in their corrosion behavior in that the initial corrosion rate of this group of materials is relatively high until protective layers form according to the alloy and the composition of the electrolytic solution.
One prime example of a material group which has found widespread use within the marine environment due to its excellent corrosion resistance are the copper-nickel alloys.

Corrosion Fatigue