http://digital.csic.es/bitstream/10261/84741/1/weathering%20steels_1.pdf

Atmospheric corrosion data of weathering steels. A review

A general corrosion function in terms of atmospheric pollutant concentrations and rain pH

Long-term forecast of corrosion mass losses of technically important metals in various world regions using a power function

Extensive research work has thrown light on the requisites for a protective rust layer to form on weathering steels (WSs) in the atmosphere, one of the most important is the existence of wet/dry cycling However, the abundant literature on WS behaviour in different atmospheres can sometimes be confusing and lacks clear criteria regarding certain aspects that are addressed in the present paper What corrosion models best fit the obtained data? How long does it take for the rust layer to stabilize? What is the morphology and structure of the protective rust layer? What is an acceptable corrosion rate for unpainted WS? What are the guideline environmental conditions, time of wetness (TOW), SO2, and Cl−, for unpainted WS? The paper makes a review of the bibliography on this issue

/pdf/some-clarifications-regarding-literature-on-atmospheric-45meb8r06u.pdf

Some Clarifications Regarding Literature on Atmospheric Corrosion of Weathering Steels

Non-health effects of airborne particulate matter

ALTHOUGH BOTH FIELD AND LABORATORY STUDIES HAVE CORRELATED STEEL CORROSION WITH ATMOSPHERIC SULFUR DIOXIDE CONCENTRATION, AND THE REACTION MECHANISM HAS BEEN SUFFICIENTLY STUDIED TO ESTABLISH A DEFINITE CAUSE--EFFECT RELATIONSHIP, UNEXPLAINED SITE-TO-SITE AND SEASON-TO-SEASON VARIATIONS HAVE LED TO THE CONCLUSION THAT UNMEASURED VARIABLES ALSO CONTRIBUTE TO STEEL CORROSION. ONE APPROACH IS TO MEASURE THE CORROSIVENESS AT EACH SITE. ANOTHER, ADOPTED IN THE PRESENT STUDY, IS TO DETERMINE THE IDENTITY OF THESE UNMEASURED VARIABLES AND THE EXTENT OF THEIR EFFECTS. THE EXPERIMENTAL DATA ARE DRAWN FROM THE CONTINUOUS AIR MONITORING PROJECT (CAMP) THAT THE PUBLIC HEALTH SERVICE HAS MAINTAINED IN EIGHT LARGE CITIES AROUND THE COUNTRY SINCE 1961. THE EXPERIMENTAL PROCEDURE AND ANALYTIC EQUATIONS ARE DESCRIBED. IT IS CONCLUDED THAT MORE THAN 90% OF THE VARIABILITY IN CORROSION BEHAVIOR OF THREE TYPES OF STEEL EXPOSED AT URBAN SITES IN THE EIGHT CITIES CAN BE ACCOUNTED FOR BY THE VARIABILITY OF CONCENTRATIONS OF TWO POLLUTANTS: SULFUR DIOXIDE INCREASES CORROSION AND OXIDANTS DECREASE IT. WHILE THE EFFECT OF THE FORMER HAS BEEN OBSERVED MANY TIMES IN THE PAST, THE EFFECT OF THE LATTER IS A NEW OBSERVATION. BECAUSE THE TWO EFFECTS ARE COUNTERACTING, THE RELATIVE RATES BY WHICH THE POLLUTANTS ARE REDUCED IN THE FUTURE WILL STRONGLY AFFECT THE CORROSION BEHAVIOR OF STEELS.

J B Upham

Papers

Effects of atmospheric pollutants on corrosion behavior of steels