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Article
Publication date: 1 March 1986

A.H.C. Hendriks

The influence of corrosive gases on the solderability of palladium/silver thick‐film conductors has been investigated. An experimental set‐up for atmospheric corrosion…

Abstract

The influence of corrosive gases on the solderability of palladium/silver thick‐film conductors has been investigated. An experimental set‐up for atmospheric corrosion testing has been constructed in which atmospheres can be created comparable to a heavily polluted industrial environment. Various Pd/Ag thick‐film conductors have been submitted for 14 days to flowing atmospheres containing 1 ppm SO2, 15, 0·2 or 0·04 ppm H2S, 1 ppm NO2, 1 ppm O3 and 0·05 ppm Cl2, separately or in various combinations. When used separately, only H2S causes a poor solderability of the thick‐film conductors. This effect on the solderability turns out to be independent of the H2S concentration; even concentrations as low as 0·04 ppm cause identical corrosion phenomena. The other gases mixed with H2S have a synergistic effect on the corrosion process.

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Microelectronics International, vol. 3 no. 3
Type: Research Article
ISSN: 1356-5362

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Article
Publication date: 1 October 1958

P.W. Sherwood

High‐temperature corrosion by H2S is a new problem in refinery technology. It is associated with catalytic reforming and desulphurisation processes which were introduced…

Abstract

High‐temperature corrosion by H2S is a new problem in refinery technology. It is associated with catalytic reforming and desulphurisation processes which were introduced during the last 5–7 years.

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Anti-Corrosion Methods and Materials, vol. 5 no. 10
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 March 1982

Z.A. Foroulis

Sour water condensates are aqueous condensates which contain different concentrations of aggressive compounds such as HCl, H2S, CO2, NH3, cyanides, etc. These condensates…

Abstract

Sour water condensates are aqueous condensates which contain different concentrations of aggressive compounds such as HCl, H2S, CO2, NH3, cyanides, etc. These condensates which can be fairly corrosive are encountered in a variety of refinery processes ranging from atmospheric distillation units to hydrodesulphurisers and sour water strippers. This paper deals with the mechanism of corrosion by these condensates and the factors influencing corrosion in several typical refinery units. In addition, methods for corrosion prevention and control are also discussed.

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Anti-Corrosion Methods and Materials, vol. 29 no. 3
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 January 1975

Boris Danilov

The objective of this paper is to present the practical aspects of corrosion control of thermal cracking plant.

Abstract

The objective of this paper is to present the practical aspects of corrosion control of thermal cracking plant.

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Anti-Corrosion Methods and Materials, vol. 22 no. 1
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 August 1964

J.W. Chilver

Although the wind of change is blowing strongly through the gas industry a substantial proportion of the gas, for some time to come, will be made by coal carbonisation and…

Abstract

Although the wind of change is blowing strongly through the gas industry a substantial proportion of the gas, for some time to come, will be made by coal carbonisation and by carburetting water gas. Even these more conventional methods will be subject to change such as the choice of lower‐rank coals to produce reactive smokeless solid fuels and the use of light Hydrocarbon oils, such as primary flash distillate, in place of gas oil. This article deals with some of the corrosion problems that arise in these more established types of plant.

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Anti-Corrosion Methods and Materials, vol. 11 no. 8
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 May 1964

Protecting steel. Many compounds have been investigated in the past for protecting ferrous metal, in petrochemical installations, from corrosive attack by chemical…

Abstract

Protecting steel. Many compounds have been investigated in the past for protecting ferrous metal, in petrochemical installations, from corrosive attack by chemical products and H2S. An experience of this type of corrosion was encountered with Lacq natural gas which contained approximately 15% H2S in addition to CO2, and porous kansite (Fe9S8) crystals were formed on the metal. A degree of protection can be obtained, it is claimed, by the presence of pyrite (FeS2) as well as pyrrhotite (Fe7S8), which can be produced from Kansite by reaction with iron pentacarbonyl in the vapour phase. This treatment is carried out in an inert atmosphere at 260°C. (927,260—Soc. Nationale des Petroles d'Aquitaine, France.)

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Anti-Corrosion Methods and Materials, vol. 11 no. 5
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 September 1960

W. Summer

Of the several causes of corrosion, bacteria form the least well‐known single group of agents. It may sound strange that microbes should cause metals to corrode. However…

Abstract

Of the several causes of corrosion, bacteria form the least well‐known single group of agents. It may sound strange that microbes should cause metals to corrode. However, it is not the bacteria but their metabolic products which are the causative agents. This discussion of the metabolic principles involved describes the type of corrosion to be expected and indicates methods of prevention.

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Anti-Corrosion Methods and Materials, vol. 7 no. 9
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 May 1992

C.O. Emenike

The increasing incidence of corrosion induced failures query the efficiency of corrosion prevention measures and/or their monitoring techniques. Of concern too, is the…

Abstract

The increasing incidence of corrosion induced failures query the efficiency of corrosion prevention measures and/or their monitoring techniques. Of concern too, is the phenomenon of twelve o'clock corrosion and the subsequent rupture. This indicated that the inhibitor was not protecting the upper surface of the pipe wall which could be possibly averted by batching a slug of inhibitor solution ahead of a pig or between pigs on regular (e.g. monthly) basis.

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Anti-Corrosion Methods and Materials, vol. 39 no. 5
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 June 1989

Z.A. Foroulis

Aqueous solutions which contain H2SO4, H2S or mixtures of H2S and NH3 are corrosive to carbon steel and other commonly used alloys. Therefore, titanium has been evaluated…

Abstract

Aqueous solutions which contain H2SO4, H2S or mixtures of H2S and NH3 are corrosive to carbon steel and other commonly used alloys. Therefore, titanium has been evaluated as a possible construction material in these environments. This paper summarizes the results of a study of the corrosion, galvanic and hydrogen embrittlement behaviour of titanium in aqueous sulfidic and sulfate solutions. Variables discussed include the effect of solution pH, temperature and solution composition on the corrosion and electro chemical behaviour including galvanic effects of titanium. This paper also considers the effect of pH, temperature and mechanical loading rate (strain‐rate) on the ductility and embrittlement of titanium.

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Anti-Corrosion Methods and Materials, vol. 36 no. 6
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 March 1978

When a stainless steel corrodes in a neutral chloride solution with the formation of pits, the anode solution in the pits has a low pH value, is rich in chlorides and…

Abstract

When a stainless steel corrodes in a neutral chloride solution with the formation of pits, the anode solution in the pits has a low pH value, is rich in chlorides and contains some H2S, formed when the sulphide inclusions dissolve in the acid anode solution.

Details

Anti-Corrosion Methods and Materials, vol. 25 no. 3
Type: Research Article
ISSN: 0003-5599

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