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08576 Durability of Passive Films in High Temperature Brines

Picture for 08576 Durability of Passive Films in High Temperature Brines
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Product Number: 51300-08576-SG
ISBN: 08576 2008 CP
Author: Joe H. Payer and Pallavi Pharkya
Publication Date: 2008
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Passive metals and alloys depend on the durability of passive oxide films for high corrosion resistance. This paper discusses the durability of the passive film on alloy 22 (a Ni-Cr-Mo alloy) as a function of chemical, thermal and mechanical durability. The durability of the passive film on alloy 22 was compared and contrasted with that of a corrosion resistant, iron-based structurally amorphous alloy, SAM1651 and with less corrosion resistant alloys such as 316L SS and AL6XN. The chemical and thermal durability were determined by the breakdown and repassivation response of the passive film and by the ability of the passive film to stifle the corrosion after initiation of severe localized corrosion. The mechanical durability of passive films was studied by examining their reformation behavior after scribing the passive film with a diamond tip. The passive film on alloy 22 showed excellent durability under aggressive conditions accompanying a detrimental chemical environment, high temperature and mechanical damage.
Passive metals and alloys depend on the durability of passive oxide films for high corrosion resistance. This paper discusses the durability of the passive film on alloy 22 (a Ni-Cr-Mo alloy) as a function of chemical, thermal and mechanical durability. The durability of the passive film on alloy 22 was compared and contrasted with that of a corrosion resistant, iron-based structurally amorphous alloy, SAM1651 and with less corrosion resistant alloys such as 316L SS and AL6XN. The chemical and thermal durability were determined by the breakdown and repassivation response of the passive film and by the ability of the passive film to stifle the corrosion after initiation of severe localized corrosion. The mechanical durability of passive films was studied by examining their reformation behavior after scribing the passive film with a diamond tip. The passive film on alloy 22 showed excellent durability under aggressive conditions accompanying a detrimental chemical environment, high temperature and mechanical damage.
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