- Title
- Atmospheric corrosion of mild steel vertical prisms, rounds and flat coupons of different shape and size
- Creator
- Jeffrey, R.; Melchers, R.
- Relation
- Australasian Corrosion Association Annual Conference: Corrosion and Prevention 2015. Proceedings of theAustralasian Corrosion Association Annual Conference: Corrosion and Prevention 2015 (Adelaide, S.A. 15-18 November, 2015)
- Publisher
- Australasian Corrosion Association (ACA)
- Resource Type
- conference paper
- Date
- 2015
- Description
- Atmospheric corrosivity typically is determined by deploying flat coupons and measuring mass loss over a specific period (usually a year) and then deriving a material loss rate (typically expressed as microns/year). Usually mild steel but also zinc, copper and aluminium coupons have been used. The derived corrosion loss is used to gauge the susceptibility of infrastructure, such as bridges and buildings, to corrosion. Previously it was shown that slightly different corrosion rates are obtained with coupons of different sizes even under identical exposure environments. From a practical perspective the question arises what size and shape of coupon most accurately reflects corrosion to be expected on realistic steel infrastructure in corresponding environments. Results from previous and new exposure trials are compared to estimate the effect of coupon size over a two year exposure period. Also, the effect of shape and size of round and prismatic specimens is investigated. The results show that larger coupon surface areas yield lower corrosion losses. The latter are considered more relevant for accurate estimation of likely corrosion losses for infrastructure.
- Subject
- steel; prisms; atmospheric corrosion; rusts
- Identifier
- http://hdl.handle.net/1959.13/1315252
- Identifier
- uon:22923
- Identifier
- ISBN:9781510822573
- Language
- eng
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