IJOART Volume 8, Issue 10, October 2019 Edition


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STUDY ON PREVENTION OF CORROSION FOR STAINLESS STEEL PIPE IN WASTEWATER TRANSPORTATION[]


A wastewater transportation system is an essential system in an urban society that conveys the wastewater streams from the commercial or residential areas towards the wastewater treatment plants. Wastewater transportation system includes pipelines and other necessary installations to transport the water from one place to another. So, the pipeline materials need to be able to withstand a variety of corrosive conditions that can be encountered while delivering wastewater. The most common type of corrosion found in the stainless-steel pipes installed in wastewater is MIC (Microbiologically influenced corrosion). This study is focused on studying the corrosion behaviour of the stainless-steel pipes installed in sewage water. The behaviour of Stainless-steel type AISI 304 in wastewater has been studied. Different field tests were performed to study the behavior in detail. Experimentation included measuring corrosion potentials, cathodic response, and CPT (Critical pitting temperatures) for the AISI 304 type steel. This study provides an alternative material AISI 316L steel and suggests this material to be used in place of AISI 3014 steel. In addition to the solution provided by an alternative material (AISI 316L) in place of AISI 304 stainless steel, this study offers another solution, for controlling the corrosion of pipes in wastewater streams, i.e., Cathodic protection. Cathodic protection was applied on stainless steel type AISI 304, and significant improvement in protection against the corrosion was observed.


Organizational Climate in Public Schools of Sibulan: A Basis for School Climate Creativity and Innovation[]


This study aimed to assess the organizational climate in public schools using Ekvallís nine climate dimensions with demographic profiles of school heads and teachers, and the relationship among the variables in the public schools in Sibulan District. The respondents of this study were 31 school heads and 257 teachers in the public elementary and secondary schools of Sibulan district. The study is descriptive and correlational in nature. It utilized percentage, mean, weighted mean and Spearman Rank Correlation in assessing the data collected through survey with the Modified Organizational Climate Questionnaire (MOCQ) as the data gathering instrument. The findings revealed that most of the nine climate dimensions were perceived by the respondents as high as manifested, practiced, and observed by them. The data also indicated that there is a significant difference between the perceptions of the school heads and teachers on the schools climate dimensions in terms of idea support. The position of the teachers was significantly and inversely related to the nine climate dimensions such as challenge, freedom, idea time, idea support, trust and openness, playfulness and humor, conflicts, debates, and risk-taking. The educational attainment of the school heads were significantly and inversely related to their perception in terms of trust and openness.



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