Holistic model for atmospheric corrosion Part 1 - Theoretical framework for production, transportation and deposition of marine salts

Abstract

This paper discusses the limitations of parametric modelling of corrosion and presents the case that accurate and exible models of atmospheric corrosion require an 'holistic' approach. In such an approach, the processes controlling corrosion across a wide range of physical scales are modelled. These models are based as much as possible on the processes controlling the phenomena under consideration. Being fundamentally based, these models can be extended outside the data sets from which they are derived. This is the rst of a series of papers outlining the use of this approach to predict corrosion in marine environments. It will consider the theoretical formulations required to model the production, transport and deposition of marine salts. It will present some predictions from these formulations and it will discuss the implications to corrosion of this theoretical understanding. Later papers will present the incorporation of these models into an information system and the validation of these models against data. CEST/2057 The authors are with CSIRO Manufacturing and Infrastructure Technologies,

Durability of concrete structures in marine atmosphere zones – The use of chloride deposition rate on the wet candle as an environmental indicator

“…Chloride aggressiveness in marine atmosphere zone has its origin in aerosol production, which can take place either in the surf zone and or in the open sea [9,10]. This mechanism, which is strongly influenced by wind characteristics [11], is more effective in seashore due to the breaking waves movement, which contributes to produce more and larger drops [11].…”

“…Other studies, which are focused on atmospheric parameters, show the salinity decay of marine aerosol when being transponed inland [7,9,15]. On the other hand, studies that show the relationship between chloride presence in atmosphere and concrete durability are still scarce.…”

Outdoor-Indoor Atmospheric Corrosion in a Coastal Wind Farm Located in a Tropical Island

“…It is concluded that salinity wetting increases salt particles sizes and rainfall removes a great amount of salt aerosol [23][24][25].…”

Penetration of marine aerosol in a tropical coastal city: Havana

“…The hygroscopicity of chloride salts increases particles size and promotes their deposition. Cole et al (2003b) illustrated that the influence of RH on salt concentration is particularly important within the range of 50-70% due to salt wetting. These authors also observed that the washout effect due to rainfall is more effective at higher RH levels.…”