Thermography for the Characterization of Corrosion Damage

2000 ◽  
Author(s):  
Ignacio Perez ◽  
Paul Kulowitch
Keyword(s):  
Corrosion Damage

Identification and Characterization of Particulate Contaminants Found at a Data Center Using Airside Economization

2019 ◽  
Vol 141 (3) ◽  
Author(s):  
Jimil M. Shah ◽  
Abel Misrak ◽  
Dereje Agonafer ◽  
Mike Kaler
Keyword(s):  
Data Center ◽  
Energy Dispersive Spectrometer ◽  
Corrosion Damage ◽  
Real World Data ◽  
Metallic Particles ◽  
Equipment Reliability ◽  
Particulate Contaminants ◽  
Electrical Components ◽  
The Impact

Contamination due to the use of airside economizer has become a major issue that cost companies revenue. This issue will continue to rise as server components become smaller, densely packed, and as companies move into more polluted environments. Contaminants with small particles less than 10 μm are not noticeable; yet, these particles are most likely to get to areas where they can cause damage. Dust from different sources and suspended in air settles on surfaces of electrical components. The dust mainly contains two components: salts and metallic particles. The salts may be neutral or corrosive and the nature of the salt depends on the deliquescent humidity. For metallic particles, surveys are performed in various data centers in order to determine the limits in terms of weight per unit area and particle size distribution. It is necessary to first identify those contaminants that directly affect the information technology (IT) equipment in the data center. In this research, a real-world data center utilizing airside economization in an ANSI/ISA classified G2 environment was chosen for the study. Servers were removed and qualitative study of cumulative corrosion damage was carried out. The particulate contaminants were collected from different locations of a server and material characterization was performed using scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), and Fourier transform infrared spectroscopy (FTIR). The analysis from these results helps to explain the impact of the contaminants on IT equipment reliability.

Nondestructive characterization of corrosion damage and fatigue life

1999 ◽  
Author(s):  
Stanislov I. Rokhlin ◽  
B. Zoofan ◽  
J.-Y. Kim ◽  
W. Dai
Keyword(s):  
Fatigue Life ◽  
Corrosion Damage ◽  
Nondestructive Characterization

Characterization of pitting corrosion damage through multiscale analysis

1999 ◽  
Author(s):  
George N. Frantziskonis ◽  
Laura B. Simon ◽  
J. Woo ◽  
Theodore E. Matikas
Keyword(s):  
Pitting Corrosion ◽  
Multiscale Analysis ◽  
Corrosion Damage

Characterization of corrosion damage in prestressed concrete using acoustic emission

2012 ◽  
Author(s):  
Jesé Mangual ◽  
Mohamed K. ElBatanouny ◽  
William Vélez ◽  
Paul Ziehl ◽  
Fabio Matta ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Prestressed Concrete ◽  
Corrosion Damage

scholarly journals Evaluation of 4-Year Atmospheric Corrosion of Carbon Steel, Aluminum, Copper and Zinc in a Coastal Military Airport in Greece

2020 ◽  
Vol 1 (1) ◽  
pp. 159-186
Author(s):  
Charalampos Titakis ◽  
Panayota Vassiliou
Keyword(s):  
Carbon Steel ◽  
Atmospheric Corrosion ◽  
Corrosion Damage ◽  
Outdoor Exposure ◽  
Atmospheric Conditions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Atomic Force ◽  
Optical Electron

Atmospheric corrosion seriously affects the working life of construction metals. The quantitative knowledge of the corrosion effects helps the maintenance and the materials’ logistics. In this work, in a military airport located by the sea, the corrosion damage equations of carbon steel, aluminum, zinc and copper are determined after outdoor exposure for four years. Exposure started in 2014, at two different periods of the year, in summer and in winter, for all cases. Weight loss measurements were performed as well as characterization of the exposed metal coupon surfaces by microscopy: optical, electron and atomic force, by X-ray diffraction and Fourier Transform Infrared Spectroscopy. Atmospheric conditions and pollutants were also evaluated. The derived corrosion equations of all tested metals for the exposure have been employed for the 30-year projection of expected corrosion. A parallel 12-month exposure of steel and aluminum—the most common airport metals—have been evaluated for five consequent years to designate the rating of the airport, according to ISO and ASTM Standards. The results showed that there is not a good correlation between the predictions of the Corrosion Damage Algorithm and the Europe Corrosion Map and the actual measurements on steel and aluminum at the site.

Sign in / Sign up

Export Citation Format

Share Document