scholarly journals Characterization of Corrosion Products on Carbon Steel Exposed to Natural Weathering and to Accelerated Corrosion Tests

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Renato Altobelli Antunes ◽  
Rodrigo Uchida Ichikawa ◽  
Luis Gallego Martinez ◽  
Isolda Costa
Keyword(s):  
Carbon Steel ◽  
Atmospheric Corrosion ◽  
Corrosion Products ◽  
Steel Plates ◽  
Natural Weathering ◽  
Poor Correlation ◽  
X Ray Diffraction ◽  
Accelerated Corrosion ◽  
Corrosion Tests ◽  
Accelerated Corrosion Tests

The aim of this work was to compare the corrosion products formed on carbon steel plates submitted to atmospheric corrosion in urban and industrial atmospheres with those formed after accelerated corrosion tests. The corrosion products were characterized by X-ray diffraction, Mössbauer spectroscopy, and Raman spectroscopy. The specimens were exposed to natural weathering in both atmospheres for nine months. The morphologies of the corrosion products were evaluated using scanning electron microscopy. The main product found was lepidocrocite. Goethite and magnetite were also found on the corroded specimens but in lower concentrations. The results showed that the accelerated test based on the ASTM B117 procedure presented poor correlation with the atmospheric corrosion tests whereas an alternated fog/dry cycle combined with UV radiation exposure provided better correlation.

scholarly journals Accelerated cyclic corrosion tests

2016 ◽  
Vol 60 (2) ◽  
pp. 46-49
Author(s):  
T. Prošek
Keyword(s):  
Quality Control ◽  
Residual Life ◽  
Material Selection ◽  
Salt Spray ◽  
Life Time ◽  
Poor Correlation ◽  
Neutral Salt ◽  
Accelerated Corrosion ◽  
Corrosion Tests ◽  
Accelerated Corrosion Tests

Abstract Accelerated corrosion testing is indispensable for material selection, quality control and both initial and residual life time prediction for bare and painted metallic, polymeric, adhesive and other materials in atmospheric exposure conditions. The best known Neutral Salt Spray (NSS) test provides unrealistic conditions and poor correlation to exposures in atmosphere. Modern cyclic accelerated corrosion tests include intermittent salt spray, wet and dry phases and eventually other technical phases. They are able to predict the material performance in service more correctly as documented on several examples. The use of NSS should thus be restricted for quality control.

scholarly journals Program of experimental atmospheric corrosion tests of weathering steels

2015 ◽  
Vol 59 (1) ◽  
pp. 7-18
Author(s):  
V. Křivý ◽  
K. Kreislová ◽  
V. Urban ◽  
K. Vavrušová
Keyword(s):  
Atmospheric Corrosion ◽  
Corrosion Products ◽  
Experimental Program ◽  
Structural Elements ◽  
X Ray Diffraction ◽  
Corrosion Tests ◽  
X Ray ◽  
One Year ◽  
Supporting Structures

Abstract This article presents the program of experimental atmospheric corrosion test of weathering steels. This program is designed as a long-term project. Attention is paid to study of corrosion processes at different structural elements of supporting structures of bridges. Measurements of corrosion losses and average thicknesses of corrosion products are carried out within this experimental program. Protective ability of corrosion products is evaluated using X-ray diffraction analysis. The article presents results of corrosion tests after one year of exposure of corrosion specimens. It results from the tests that corrosion losses of weathering steels are signifi cantly conditioned by position and location of exposed surface within the structure.

scholarly journals Corrosion behavior of galvanic couple between aluminum alloy and carbon steel with accelerated corrosion tests

2021 ◽  
Vol 71 (2) ◽  
pp. 102-111
Author(s):  
Yoshiyuki Oya ◽  
Shohei Iwao ◽  
Daisuke Nagasawa ◽  
Kazuhiko Minami ◽  
Kazuhiro Kobori ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Carbon Steel ◽  
Corrosion Behavior ◽  
Accelerated Corrosion ◽  
Corrosion Tests ◽  
Galvanic Couple ◽  
Accelerated Corrosion Tests

Host-Guest Systems in the Development of Anticorrosive Polymeric Films

1999 ◽  
Vol 576 ◽  
Author(s):  
L. R. M. Estevão ◽  
R. S. V. Nascimento
Keyword(s):  
Carbon Steel ◽  
Mass Loss ◽  
Diatomaceous Earth ◽  
Corrosion Inhibitors ◽  
Polymeric Films ◽  
Thermally Stable ◽  
Accelerated Corrosion ◽  
Corrosion Tests ◽  
Accelerated Corrosion Tests ◽  
Nay Zeolites

ABSTRACTInteractive dispersion-type LDPE/EVA films with anticorrosive properties were produced using host-guest systems of thermally stable volatile corrosion inhibitors (VCI) dicyclohexylammonium p-nitrobenzoate and phosphate, adsorbed on NaY zeolites and diatomaceous earths. Carbon steel specimens were either directly exposed to the inhibiting systems studied or wrapped with the additivated films. Accelerated corrosion tests were carried out where the inhibitive properties of the systems being studied were determined by mass loss of the test coupons. The influence of the mineral support on the volatility of the corrosion inhibitors was evaluated by TG/DTG techniques. The obtained results may be regarded as a confirmation of the hypothesis that VCI volatility may be controlled by their deposition on determined supports. Also, both VCIs had their efficiency enhanced by zeolites, and the phosphate greatly benefited from the use of diatomaceous earth.

Evaluation Method for Time-Dependent Corrosion Behavior of Carbon Steel Plate Using Atmospheric Corrosion Monitoring Sensor

2009 ◽  
Vol 417-418 ◽  
pp. 417-420 ◽  
Author(s):  
Shigenobu Kainuma ◽  
Kunihiro Sugitani ◽  
Yoshihiro Ito ◽  
In Tae Kim
Keyword(s):  
Carbon Steel ◽  
Corrosion Behavior ◽  
Atmospheric Corrosion ◽  
Evaluation Method ◽  
Steel Plates ◽  
Time Dependent ◽  
Corrosion Monitoring ◽  
Corrosion Sensor ◽  
Atmospheric Exposure ◽  
Corrosive Environments

The purpose of this research is to propose a method for evaluating the time-dependent corrosion behavior of carbon steel plates using an atmospheric corrosion monitor (ACM) corrosion sensor consisting of a Fe/Ag-galvanic couple. Atmospheric exposure tests were carried out on steel　plates for periods of 6, 12, and 24-months on the island of Okinawa in Japan. The Specimens were mounted on racks at angles of 0, 45 and 90 to the horizontal to obtain corrosion data in various corrosive environments. In addition, the environments of the skyward- and groundward-facing surfaces of the specimens were monitored using ACM sensors. The sensor outputs were recorded during the exposure tests.

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