A Galvanic Sensor for Monitoring the Corrosion Damage of Buried Pipelines: Part 2—Correlation of Sensor Output to Actual Corrosion Damage of Pipeline in Soil and Tap Water Environments

CORROSION ◽  
2006 ◽  
Vol 62 (6) ◽  
pp. 522-532 ◽  
Author(s):  
Y-S. Choi ◽  
J-G. Kim ◽  
S. J. Yang
Keyword(s):  
Tap Water ◽  
Corrosion Damage ◽  
Sensor Output ◽  
Buried Pipelines ◽  
Galvanic Sensor

scholarly journals Efficiency of Different Electrolytes on Electrochemical Chloride Extraction to Recover Concrete Structures under Chloride-Induced Corrosion

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Thamara Tofeti Lima ◽  
Ki Yong Ann
Keyword(s):  
Calcium Hydroxide ◽  
Tap Water ◽  
Corrosion Damage ◽  
Experimental Results ◽  
Optimal Decision ◽  
Cement Matrix ◽  
Lithium Borate ◽  
Concrete Deterioration ◽  
Chloride Induced Corrosion ◽  
Electrochemical Chloride Extraction

Chloride-induced corrosion is one of the main causes of concrete deterioration and imposes a challenge to sustainability. Traditional techniques to repair corroded structures consisted of basically removing the damaged area, which was either economical or sustainable. Therefore, electrochemical chloride extraction (ECE) gained popularity for being an efficient nondestructive treatment applied temporarily to structures. On this line, this manuscript aims to raise the efficiency of ECE by an optimal decision of the treatment setup concerning the electrolyte choice. Three different electrolytes were tested, namely, tap water, calcium hydroxide, and lithium borate. Experimental results pointed to lithium borate as the most efficient electrolyte for extracting chlorides while calcium hydroxide was a better choice to repassivate the structure and even heal cracks, due to a possible electrodeposition of the electrolyte ions on the cement matrix. Thus, depending on the main goal of the treatment, different electrolytes achieve a better performance, which highlights the importance of pretreatment evaluation to see in which stage of corrosion damage is the structure.

A numerical external pitting damage prediction method of buried pipelines

2020 ◽  
Vol 38 (5) ◽  
pp. 433-444
Author(s):  
Eliceo Sosa ◽  
Adrian Verdín Martinez ◽  
Jorge L. Alamilla ◽  
Antonio Contreras ◽  
Luis M. Quej ◽  
...  
Keyword(s):  
Neural Network ◽  
Corrosion Rate ◽  
Prediction Model ◽  
Influencing Factors ◽  
Prediction Models ◽  
Prediction Method ◽  
Corrosion Damage ◽  
Buried Pipelines ◽  
Damage Prediction ◽  
External Corrosion

AbstractThe work introduces a numerical external damage prediction method for buried pipelines. The external pitting initiation and corrosion rate of oil or gas pipelines are affected by pipeline age, physicochemical properties of soils and cathodic protection performance as well as coating conditions. Before developing the damage prediction model, the influencing factors were weighed by grey relational analysis, and then the relationship among the pitting depth and the influencing factors of external corrosion was established for corrosion damage prediction through artificial neural network (ANN). Subsequently, the established ANN was applied to predict corrosion damage and corrosion rate for some selected cases, and the neural network prediction model was analyzed and compared to another corrosion rate prediction models. Through the analysis and comparison, a few opinions were proposed on the external corrosion damage prediction and pipeline integrity management.

Review of Dynamic Response of Buried Pipelines

2021 ◽  
Vol 12 (2) ◽  
pp. 03120003
Author(s):  
Ronghuan Xu ◽  
Ruinian Jiang ◽  
Tie-jun Qu
Keyword(s):  
Dynamic Response ◽  
Buried Pipelines

STUDIES IN THE SUPPOSED GOITROGENOUS EFFECT OF TAP WATER IN HELSINKI

1960 ◽  
Vol XXXIII (IV) ◽  
pp. 630-636
Author(s):  
F.-E. Krusius ◽  
P. Peltola
Keyword(s):  
Tap Water ◽  
Physiological Saline ◽  
Normal Weight ◽  
The Body ◽  
Iodine Uptake ◽  
Redistilled Water ◽  
Detectable Difference ◽  
Term Administration ◽  
Long Term Experiment

ABSTRACT The study reported here was performed in order to examine the tap water of Helsinki for its alleged goitrogenous effect. In a short-term, 24-hour experiment with rats, kept on an iodine-poor diet, we noticed no inhibition of the 4-hour 131I uptake, as compared with that of animals receiving physiological saline instead of tap water. Two similar groups of rats receiving 1 and 2 mg of mercazole in redistilled water showed a distinct blockage of the 4-hour uptake, which proved the effect of this substance. In a long-term experiment of 5 weeks' duration there was no detectable difference in the body weight, thyroid weight and the 4-hour 131I uptake when the rats receiving tap water or distilled water to which 0.45 per cent of sodium chloride was added were compared with each other. Replacement of tap water by a 10 mg per cent solution of mercazole in redistilled water enlarged the thyroid to double its normal weight and increased the 131I uptake to approximately five times that of the controls. Thus our experiments failed to demonstrate any goitrogenous effect in the tap water of Helsinki. Changes similar to those produced by a long-term administration of mercazole, i. e. an enlargement of the thyroid and an increased thyroidal iodine uptake, have been shown to be due to milk collected from goitrous areas. The observations here reported confirm the importance of milk in the genesis of the goitre endemia of Helsinki. Attention is further called to the fact that a thyroidal enlargement combined with an increased thyroidal iodine uptake cannot always be taken as a sign of iodine deficiency because similar changes may be produced by the administration of goitrogens.

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