Stainless steel fasteners are not easily corrode

Where corrosion is a possible factor, these stainless steel fasteners are used. Corrosion depends on the metal characteristics and hence where the reduction of corrosion is crucial, stainless fasteners are used. This material is a versatile one and is used in a number of situations where the material is required to be strong and durable when compared to the other metals.

Carbon steel screw series in stainless steel members should be avoided because the ratio of the area of the stainless steel to the carbon steel is large and the bolts will be subject to aggressive attack. Conversely, the rate of attack of a carbon steel member by a stainless steel bolt is much slower.

Crevices typically occur between nuts and washers or around the thread of a screw or the shank of a bolt. Crevices can also occur in welds which fail to penetrate and under deposits on the steel surface. The severity of crevice corrosion is very dependent on the geometry of the crevice; the narrower and deeper the crevice, the more severe the corrosion. Buy carbon steel screw from China is impossible this phenomenon occurred.

The grain boundaries become prone to preferential attack on subsequent exposure to a corrosive environment. Steels in this condition are termed 'sensitised'.