ESTIMATING EFFECTS OF VARIOUS FACTORS ON CORROSION OF PIPELINE GRADE CARBON STEEL UNDER DISBONDED COATING PROGRESS REPORT

2019 ◽  
Author(s):  
Pavan Shukla
Keyword(s):  
Carbon Steel ◽  
Progress Report ◽  
Disbonded Coating

A Comparative Study of the Effects of Sulfate Reducing Bacteria on Corrosion of Carbon Steel Q235 under Simulated Disbonded Coating with Different Width of Aperture

2012 ◽  
Vol 503-504 ◽  
pp. 247-250 ◽  
Author(s):  
Ping Zhao ◽  
Jia Xing Yang ◽  
Peng Peng Zhu ◽  
Cheng Sun ◽  
Jin Xu
Keyword(s):  
Carbon Steel ◽  
Corrosion Potential ◽  
Sulfate Reducing Bacteria ◽  
Soil Extract ◽  
Corrosion Process ◽  
Sulfate Reducing ◽  
Aperture Width ◽  
Reducing Bacteria ◽  
Disbonded Coating ◽  
Crevice Width

The effect of sulfate reducing bacteria (SRB) on the corrosion of Q235 steel has been investigated in the crevice under the simulated disbonded coating with aperture width of 1.0 and 0.5mm in the soil-extract solutions (SES) by using electrochemical methods. The results show that the existence of SRB in SES can cause corrosion potential of the working electrode to shift to a more negative value, and the formation of pitting on the surface of the electrode. Compared with the crevice width of 1.0mm, the corrosion potential of the electrode shows a little more positive at the crevice width of 0.5mm. The corrosion rate of the electrode increases with the increase of aperture width in the SES without SRB, however, decreases with the increase of aperture width in the SES with SRB. The results obtained indicate that either bio-film on the surface of the electrode formed by SRB in SES or aperture width has obvious influences on the crevice corrosion process of the carbon steel.

Corrosion of Carbon Steel Q235 in a Crevice Under a Simulated Disbonded Coating

CORROSION ◽  
10.5006/1224 ◽  
2014 ◽  
Vol 70 (7) ◽  
pp. 686-694
Author(s):  
Jin Xu ◽  
Cheng Sun ◽  
Maocheng Yan ◽  
Fuhui Wang
Keyword(s):  
Carbon Steel ◽  
Disbonded Coating

Spectrophotometric measurements of objective-prism spectra

1966 ◽  
Vol 24 ◽  
pp. 118-119
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Progress Report ◽  
Two Dimensional ◽  
Objective Prism ◽  
Made In

I should like to give you a very condensed progress report on some spectrophotometric measurements of objective-prism spectra made in collaboration with H. Leicher at Bonn. The procedure used is almost completely automatic. The measurements are made with the help of a semi-automatic fully digitized registering microphotometer constructed by Hög-Hamburg. The reductions are carried out with the aid of a number of interconnected programmes written for the computer IBM 7090, beginning with the output of the photometer in the form of punched cards and ending with the printing-out of the final two-dimensional classifications.

Progress report on 21-cm observations at low latitude between longitudes (l 11) 0° and 66°

1967 ◽  
Vol 31 ◽  
pp. 177-179
Author(s):  
W. W. Shane
Keyword(s):  
Preliminary Report ◽  
Progress Report ◽  
Galactic Centre ◽  
Low Latitude ◽  
The Third ◽  
Introductory Lecture ◽  
Centre Region

In the course of several 21-cm observing programmes being carried out by the Leiden Observatory with the 25-meter telescope at Dwingeloo, a fairly complete, though inhomogeneous, survey of the regionl11= 0° to 66° at low galactic latitudes is becoming available. The essential data on this survey are presented in Table 1. Oort (1967) has given a preliminary report on the first and third investigations. The third is discussed briefly by Kerr in his introductory lecture on the galactic centre region (Paper 42). Burton (1966) has published provisional results of the fifth investigation, and I have discussed the sixth in Paper 19. All of the observations listed in the table have been completed, but we plan to extend investigation 3 to a much finer grid of positions.

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