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Title: From Laboratory Corrosion Tests to a Corrosion Lifetime for Wood Fasteners: Progress and Challenges

Source: In: Proceedings of the International Convention of Society of Wood Science and Technology and United Nations Economic Commission for Europe - Timber Committee October 11-14, 2010, Geneva, Switzerland; 2010

Author(s)Zelinka, Samuel L.; Derome, Dominique; Glass, Savuel V.

Publication Year: 2010  View PDF »

Category: Conference Proceedings
Associated Research Project(s):   FPL-4723-1

Abstract: Determining a ″corrosion-lifetime″ for fasteners embedded in wood treated with recently adopted preservative systems depends upon successfully relating results of laboratory tests to inservice conditions. In contrast to laboratory tests where metal is embedded in wood at constant temperature and moisture content, the in-service temperature and moisture content of wood exhibit large fluctuations which affect the corrosion rate. The paper presents an approach for determining the corrosion lifetime of fasteners in which the calculated wood moisture content at the wood-fastener interface is used to predict the corrosion rate as a function of time through coupling two models. First, the moisture content across the wood component is calculated using a finite element code solving the coupled heat and mass transport equations with climatic data used as boundary conditions. Secondly, at the wood-fastener interface, the instantaneous corrosion rates are computed using an empirical corrosion model and integrated with time. Preliminary results for a simplified geometry are presented in this paper.

Keywords: Wood preservatives, corrosion, fasteners, testing, moisture, wood moisture, temperature, metal testing, engineering joints, fasteners, metal corrosion, mathematical models, equations, humidity, service life, finite element method, mass transfer, galvanized steel, steel corrosion, preservatives, copper azole, CuAz, connectors, treated wood, preservative treated wood, review article, reviews, moisture content, exposure tests, durability, chromated copper arsenate, CCA, alkaline copper quat, ACQ, hygrothermal modeling

Publication Review Process: Informally Refereed (Peer-Reviewed)

File size: 180 kb(s)

Date posted: 06/10/2011

This publication is also viewable on Treesearch:  view
RITS Product ID: 37869
Current FPL Scientists associated with this product (listed alphabetically)
Glass, Samuel V.
Research Physical Scientist
Zelinka, Samuel L.
Materials Research Engineer
 

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