Crevice corrosion mitigation

Crevice corrosion is ideally prevented at the design stage by avoiding them in the first place or during construction by filling uncorroded dry crevices with a durable jointing compound that will exclude moisture and remain resilient. 

Eliminate or carefully seal lap joints so that they will not open up  

Be careful when using packing materials or thermal insulation which can hold moisture in contact with metals 

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The control of corrosion in pharmaceutical product processes is largely managed through the use of stainless steel. Rust-free surfaces and cleanliness issues to prevent product contamination have been the primary corrosion concerns. Resistance to mildly aggressive cleaning solutions and saline solutions and the potential for under deposit or crevice corrosion present the most severe service conditions. The high standards of cleanliness necessary for pharmaceutical processes favor the mitigation of corrosion. 

Design-to-prevent is a useful approach to avoid pitting and crevice corrosion. Some examples of surface treatments and coatings to mitigate pitting and crevice corrosion are the following ... 

Betts A.J., Boulton L.H., Crevice corrosion Review of mechanism, modeling and mitigation, British Corrosion Journal, vol. 28, 1993, p. 279-295. 

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