Intergranular corrosion of DIN 1630 ST44.4 seamless steel pipe. It refers to corrosion along dislocations, which destroy the connections between crystals. This kind of corrosion is hazardous, it will make DIN 1630 ST44.4 seamless steel pipe brittle or lose its compressive strength, which is very easy to cause safety accidents.
Intergranular corrosion is the key corrosion method of martensitic DIN 1630 ST44.4 seamless steel pipe. It is because the dislocation area and the crystal composition or ground stress are different, resulting in a significant decrease in the electrode potential in the dislocation area, which in turn causes the electrode potential The difference.
Fatigue corrosion of DIN 1630 ST44.4 seamless steel pipe. Refers to the damage of the DIN 1630 ST44.4 seamless steel pipe under the effect of corrosive substances and alternating ground stress, characterized by corrosion pits and many cracks.
Significantly reduce the fatigue limit of DIN 1630 ST44.4 seamless steel pipe, causing premature rupture. Corrosion fatigue of seamless steel pipe does not mean fatigue of mechanical equipment, it does not have a certain fatigue strength.
