Corrosion at the Polymer-Metal Interface in Artificial Seawater Solutions

Table 1

Deformation of Buna-N round O-rings fitted on 316 stainless steel.^a

Entry	O-Ring type	Starting ID (mm)	Final ID (mm)	ΔID (mm)	Crevice corrosion^b	Stainless steel
1	Buna-N round	12	13.9	1.9	Severe
2	Buna-N round	13	13.9–14.05	0.9–1.05	Moderate
3	Buna-N round	14	15.02–15.12	1.02–1.12	Moderate

^aData for one 12 mm, two 13 mm, and two 14 mm O-rings. ^bnone: no observable crevice corrosion under O-ring, low: minimal surface indentation due to crevice corrosion, moderate: small surface indentation, and severe: large surface indentation.