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1 – 10 of 607A relatively recent development in the field of corrosion prevention has been the advent of the volatile inhibitor, although it is true to say that inhibition may occur when the…
Abstract
A relatively recent development in the field of corrosion prevention has been the advent of the volatile inhibitor, although it is true to say that inhibition may occur when the normally volatile inhibitor is in the solid or gaseous state. Inhibitors are chemical substances which will reduce the intensity of the anodic or cathodic reactions. The most important class of chemical agents used function by changing the electrochemical processes occurring at the metallic surfaces, e.g. chromates, nitrites and phosphates.
In the continuing struggle against corrosion one of the most difficult problems to contend with is that of internal corrosion in inaccessible areas. Surfaces which cannot…
Abstract
In the continuing struggle against corrosion one of the most difficult problems to contend with is that of internal corrosion in inaccessible areas. Surfaces which cannot conveniently be coated with paints, lacquers or protective oils, and yet which are subject to corrosion arising from the condensation of moisture, can be extremely difficult to preserve.
This is the first of a series of articles surveying recent trends and new developments in specialised fields of corrosion, in this case inhibitors. A corrosion inhibitor is a…
Abstract
This is the first of a series of articles surveying recent trends and new developments in specialised fields of corrosion, in this case inhibitors. A corrosion inhibitor is a substance which prevents, or reduces the rate of corrosion of a metal placed in an environment normally corrosive to it.
GERMANY Corrosion and acid engineering. The article contains a description of the problems and the industrialisation of modern acid engineering. Acid engineering is engaged in the…
Abstract
GERMANY Corrosion and acid engineering. The article contains a description of the problems and the industrialisation of modern acid engineering. Acid engineering is engaged in the protection against corrosion and acids and the construction of acid‐proof installations and buildings. A classification of the characteristic methods of concrete and steel working presents an introductory survey. A number of materials as well as raw, and auxiliary, materials and their important physical datas are tabulated. The importance of protective covers is pointed out. Special attention is called to sources of error. Two new auxiliary materials, Corroplast N and H, are gaining increasing application in modern acid engineering.
This paper deals with the causes and mechanisms of internal corrosion of tanks used for the storage of crude oil and distillates. Services which are considered in this paper…
Abstract
This paper deals with the causes and mechanisms of internal corrosion of tanks used for the storage of crude oil and distillates. Services which are considered in this paper include crude oil storage tanks, gasoline blending and/or storage tanks and storage tanks for kerosene and heavier distillates. Fixed‐roof, as well as floating‐roof tanks, are considered. Methods for corrosion prevention and control are discussed.
The protection of metal parts with volatile corrosion inhibitor (VCI) or vapour‐phase inhibitor (VPI) materials has been receiving increasing acceptance in the packaging field…
Abstract
The protection of metal parts with volatile corrosion inhibitor (VCI) or vapour‐phase inhibitor (VPI) materials has been receiving increasing acceptance in the packaging field because of the simplicity of the wrapping and depreservation procedures. Unlike the preservative oils which function by excluding moisture, these compounds function in the presence of moisture and oxygen on ferrous metal surfaces. The action is somewhat similar to that of a rust inhibitor in an automobile radiator. However, instead of distributing the inhibitor as a liquid, volatile inhibitors depend upon gaseous diffusion of vapours and require smaller quantities of inhibitor than the preservative oil procedure. There is the added advantage that the equipment can be stored in an operable, yet protected, condition.
D.M. Bastidas, E. Cano and E.M. Mora
To provide a selective bibliography for graduate students and new faculty members with sources which can help them develop their academic career.
Abstract
Purpose
To provide a selective bibliography for graduate students and new faculty members with sources which can help them develop their academic career.
Design/methodology/approach
A range of published (1951‐2004) works, which aim to discuss the main parameters of the volatile corrosion inhibition process. The sources are sorted into sections: transport of the volatile corrosion inhibitor (VCI) to the metallic surface, vapour pressure of a VCI, dependence of vapour pressure upon temperature, effect of pH on VCI behaviour, formation and destruction of adsorbed films, and volatile corrosion inhibitor monitors (VCIM).
Findings
Provides information about each source, indicating what can be found there and how the information can help. Recognises the lack of real training of many academics before they are expected to take on teaching/researching duties and finds some texts which help.
Research limitations/implications
It is not an exhaustive list and apart from several UK and US books all the rest are EU and US publications which perhaps limits its usefulness elsewhere.
Practical implications
A very useful list of the most common compounds used as VCIs is reported.
Originality/value
This paper fulfils an identified information/resources need and offers practical help to an individual starting out on and academic career and to professional with some experience on corrosion inhibition.
Details
Keywords
Introduction Atmospheric corrosion of metals is responsible for an appreciable percentage of total corrosion damage; it has almost come to be accepted as an unavoidable factor to…
Abstract
Introduction Atmospheric corrosion of metals is responsible for an appreciable percentage of total corrosion damage; it has almost come to be accepted as an unavoidable factor to be calculated into the price of new products. Unfortunately, out ore reserves are finite, and such unnecessary waste of resources is becoming increasingly intolerable.
Viktoria Vorobyova, Margarita Skiba and Olena Chygyrynets’
This paper aims to investigate the efficacy of grape pomace extract (GPE) as an eco-friendly vapor phase green inhibitor for corrosion of steel and assess the effect of the major…
Abstract
Purpose
This paper aims to investigate the efficacy of grape pomace extract (GPE) as an eco-friendly vapor phase green inhibitor for corrosion of steel and assess the effect of the major compounds of extract on the inhibition efficiency.
Design/methodology/approach
The present study was carried out to identify the components present in the 2-propanol GPE by gas chromatography–mass spectrometry (GC-MS) analysis. Gravimetric, electrochemical impedance spectroscopy, potentiodynamic polarization, scanning electron microscopy and FTIR techniques were used to study the corrosion inhibitive.
Findings
GPE has inhibited mild steel corrosion in conditions of periodic condensation of moisture. The gravimetric measurement indicates that inhibition efficiency shows direct proportional relation with concentration of inhibitor. The GPE and main components acted as a mixed-type inhibitor with predominant cathodic effectiveness. Research limitations/implications. Because of the presence of large number of compounds in the extract, it becomes difficult to understand the most active compound responsible for inhibition. However, from gas chromatography, mass spectrometry and quantum data, the assumption has been made that the major compound of GPE is responsible for the inhibition activity.
Practical implications
The extract can be used in the temporary corrosion protection and is designed to prevent the corrosion of metal surfaces of equipment during transportation and storage.
Originality/value
GPE can be used as a potential source of ecofriendly corrosion inhibitor for steel corrosion.
Details
Keywords
Since our last report in April 1984 several developments and new uses for Vaporol volatile corrosion inhibitor oil have emerged.