Many hexagonal etching pits,which emergence at the dislocations,are observed.

The correlation between corrosion pit with equivalent initial surface crack;

Single edge notch tension(SENT) specimens with 100～300mm diameter corrosion pit prefabricated at the root of the notch were used to investigate the behavior of corrosion fatigue small-crack of 2024-T62 high strength aluminum alloys.

The corrosion pits on the blade surface contributed to such failure as an additive factor.

The etch pits of dislocations were revealed on the r-plane (1102) sapphire by using a melted KOH as etchants.

The morphologies and arrangement of dislocation etch pits in surface of the samples are observed carefully,and the average densities of dislocation etch pits in surface of as grown samples and in annealed samples are also measured.

The morphology and density distribution of etch pits formed by Schaake and Chen etchants on the {111} B face of HgCdTe liquid phase epitaxy films are studied.

In 1995,a big corrosion pit was found in the upper spherical head of the urea reactor for the leaking of the corrosive solution through the liner,this situation happened in other factories as well.

A straight pipe in piping system with orifice is simulated using ABAQUS,on the assumption that a corroded pit is in front of orifice,and the stress response of the corroded pit is obtained sequentially.