Crevice and galvanic corrosion
With a decrease in the acidity of the medium or a decrease in atmospheric pressure, the protective passivating layer of steel may collapse. This is typical for parts under gaskets, in sharp corners, or with inferior welding. Such gaps quickly corrode if aggressive substances penetrate them. Crevice corrosion is similar to pitting corrosion, but develops at lower temperatures.
It is a charactron for a galvanic pair between two dissimilar metals. The electro potential arising between them leads to the electrolytic decay of the more chemically active metal. To prevent this effect can be electrical insulation of metals, Usually use plastic or rubber washers and bushings that prevent moisture from getting between the parts. The absence of moisture makes it difficult to form an electrolytic vapor. Another way is to keep the size of the more active metal relatively less active (the stainless steel bolts in the aluminum block do not cause corrosion, but the aluminum rivets in the stainless steel sheet are rapidly oxidized.)
The assortment of stainless steel at the warehouse of the company «Electrovek-Steel» complies with GOST and international quality standards. A wide choice of products of any parameters, exhaustive consultations of our managers, reasonable prices and timely delivery determine the face of our company. We accept wholesale and retail orders. At wholesale purchases the system of discounts operates.