scholarly journals Atmospheric Corrosion Behavior of Mild Steel in the Initial Stage under Different Relative Humidity

2018 ◽  
Vol 4 (2) ◽  
Author(s):  
Cui Lin ◽  
Sanjuan Chen
Keyword(s):  
Relative Humidity ◽  
Mild Steel ◽  
Corrosion Behavior ◽  
Atmospheric Corrosion ◽  
Initial Stage

Effect of Relative Humidity on the Initial Atmospheric Corrosion Behavior of Zinc during Drying

2013 ◽  
Vol 160 (8) ◽  
pp. C380-C389 ◽  
Author(s):  
Qingli Cheng ◽  
Shanhua Song ◽  
Liying Song ◽  
Baorong Hou
Keyword(s):  
Relative Humidity ◽  
Corrosion Behavior ◽  
Atmospheric Corrosion

Effect of Thickness of Water Film on Atmospheric Corrosion Behavior of Carbon Steel

2005 ◽  
Vol 475-479 ◽  
pp. 221-224
Author(s):  
Yuji Hosoya ◽  
Tadashi Shinohara ◽  
Shin-ichi Motoda ◽  
Wataru Oshikawa
Keyword(s):  
Carbon Steel ◽  
Relative Humidity ◽  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Atmospheric Corrosion ◽  
Water Film ◽  
Adsorbed Water ◽  
Sea Salt ◽  
Adsorbed Water Film

Atmospheric corrosion for carbon steel was discussed with taking notice of the relation between the corrosion rate, CR, and the thickness of adsorbed water film, d, onto deposited sea salt. Amount of water adsorbed onto sea salt was measured under various conditions of amount of deposited sea salt, Ws, and relative humidity, RH. Derived concentration of the solution film was compared with that calculated thermodynamically. Corrosion amount of carbon steel specimens exposed for a month under various Ws and RH was measured and CR along with d were obtained for each condition. The relations of CR to d had the same tendency as is found on “moist corrosion” and “wet corrosion” in Tomashov’s model; However, it showed a maximum CR = 0.29mm/y at d = 56µm, thicker than that reported by Tomashov.

Comparative Atmospheric Corrosion Behavior of a Mild Steel and an Interstitial Free Steel

2018 ◽  
Vol 27 (9) ◽  
pp. 4497-4506 ◽  
Author(s):  
Pratik Murkute ◽  
Ravi Kumar ◽  
S. Choudhary ◽  
H. S. Maharana ◽  
J. Ramkumar ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Behavior ◽  
Atmospheric Corrosion ◽  
Interstitial Free ◽  
Interstitial Free Steel

scholarly journals Effect of Oxide Scale Microstructure on Atmospheric Corrosion Behavior of Hot Rolled Steel Strip

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 517
Author(s):  
Bin Sun ◽  
Lei Cheng ◽  
Chong-Yang Du ◽  
Jing-Ke Zhang ◽  
Yong-Quan He ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Oxide Scale ◽  
Corrosion Product ◽  
Corrosion Behavior ◽  
Corrosion Test ◽  
Atmospheric Corrosion ◽  
Corrosion Mechanism ◽  
Type I ◽  
Rust Layer ◽  
Hot Rolled

The atmospheric corrosion behavior of a hot-rolled strip with four types (I–IV) of oxide scale was investigated using the accelerated wet–dry cycle corrosion test. Corrosion resistance and porosity of oxide scale were studied by potentiometric polarization measurements. Characterization of samples after 80 cycles of the wet–dry corrosion test showed that scale comprised wüstite and magnetite had strongest corrosion resistance. Oxide scale composed of inner magnetite/iron (>70%) and an outer magnetite layer had the weakest corrosion resistance. The corrosion kinetics (weight gain) of each type of oxide scale followed an initial linear and then parabolic (at middle to late corrosion) relationship. This could be predicted by a simple kinetic model which showed good agreement with the experimental results. Analysis of the potentiometric polarization curves, obtained from oxide coated steel electrodes, revealed that the type I oxide scale had the highest porosity, and the corrosion mechanism resulted from the joint effects of electrochemical behavior and the porosity of the oxide scale. In the initial stage of corrosion, the corrosion product nucleated and an outer rust layer formed. As the thickness of outer rust layer increased, the corrosion product developed on the scale defects. An inner rust layer then formed in the localized pits as crack growth of the scale. This attacked the scale and expanded into the substrate during the later stage of corrosion. At this stage, the protective effect of the oxide scale was lost.

Corrosion behavior of ASTM 1045 mild steel in palm biodiesel

2015 ◽  
Vol 81 ◽  
pp. 457-463 ◽  
Author(s):  
Dingfeng Jin ◽  
Xuehua Zhou ◽  
Panpan Wu ◽  
Li Jiang ◽  
Hongliang Ge
Keyword(s):  
Mild Steel ◽  
Corrosion Behavior

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.

Elastic-plastic response of a sandwich cylinder subjected to internal pressure

1971 ◽  
Vol 6 (4) ◽  
pp. 273-278 ◽  
Author(s):  
H F Muensterer ◽  
F P J Rimrott
Keyword(s):  
Mild Steel ◽  
Internal Pressure ◽  
Plastic Flow ◽  
Plastic Response ◽  
Concentric Cylinders ◽  
Initial Stage ◽  
Sandwich Type ◽  
Plastic Zones ◽  
Thin Walled ◽  
Von Mises

The propagation of plastic zones in a thin-walled sandwich-type cylinder has been analysed theoretically. Boundary conditions are clamped-clamped at both ends, i.e. no rotation is permitted. The material was assumed to behave isotropically and to obey the yieid criterion of Huber-Hencky-von Mises. Deformation was computed on the assumption that the vector of rate of strain was normal to the plastic-interaction curve. The predicted result was verified experimentally. Four specimens were built by lamination of a hexcell core between two concentric cylinders. In the two mild-steel specimens, the initial stage of plastic flow conformed well with the prediction. This proved that plastic flow is not initiated at the mid-position between the end constraints. In two aluminium specimens, this phenomenon of incipient plastic flow could not be observed owing to the absence of a pronounced yield point. The overall agreement was, however, satisfactory.

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