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Improved performance of phosphoric acid anti-corrosive pretreatments when aluminium hydroxide is added / E. Almeida in SURFACE COATINGS INTERNATIONAL, Vol. 78, N° 1 (01/1995)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 78, N° 1 (01/1995) . - p. 6-12 Titre : Improved performance of phosphoric acid anti-corrosive pretreatments when aluminium hydroxide is added Type de document : texte imprimé Auteurs : E. Almeida, Auteur ; D. Pereira, Auteur ; M. Q. Figueiredo, Auteur ; M. Morcillo, Auteur ; V. M. M. Lobo, Auteur Année de publication : 1995 Article en page(s) : p. 6-12 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture  anticorrosion'  'Protection  corrosion'  'Préparation  surface'  Phosphatation  'Phosphorique  acide'  'Aluminium  Hydroxyde'  Acier  'Etude  expérimentale' Index. décimale : 667.9 Revêtements et enduits Résumé : This work presents the main results of an experimental study carried out with rust pretreatments based on phosphoric acid solutions with the additionof aluminium hydroxide. Because the transformation of rust steel surfaces by phosphoric acid solutions depends strongly on the interfacial conditions, the first step in this work was the clear definition of rust formation conditions and of a reproducible technique for burshing them to a known degree as defined in standard SIS 055900. After that, the best range of acid concentration was optimised in the case of phosphoric acid solutions and phosphoric acid solutions saturated with aluminium hydroxide. Several characterisation techniques were used, such as scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), infrared spectrometry (FTIR) and X-ray diffraction (XRD), to interpret the phenomenon of rust transformation. The results obtained lead to the conclusion that the best anti-corrosive behaviour of phosphoric acid solutions is obtained when they are saturated with aluminium hydroxide. Note de contenu : - Steel substrated used - Pretreatments used and their application - Surface characterisation - Paint coating application and its behaviour Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16902 [article]

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Coating structural steelwork - added value or unnecessary cost / G. J. Gedge in SURFACE COATINGS INTERNATIONAL, Vol. 78, N° 1 (01/1995)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 78, N° 1 (01/1995) . - p. 16-18 Titre : Coating structural steelwork - added value or unnecessary cost Type de document : texte imprimé Auteurs : G. J. Gedge, Auteur Année de publication : 1995 Article en page(s) : p. 16-18 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture  anticorrosion'  Utilisation  Acier  'Construction  métallique' Index. décimale : 667.9 Revêtements et enduits Résumé : In the ever increasingly competitive construction industry, cost savings and shortening of construction periods is placing increasing pressure on all concerned with steel fabrication. These pressures to save time and money are most apparent in the currently favoured climate of Design and Build contracts. It is an unfortunate fact that in any cost saving exercise corrosion protection is always first to be targeted. This may be understandable in some instances where inappropriate overspecification has occured but in many others it is not and results in underspecification. Neither situation is desirable ; in the case of overspecification the long term competitiveness of steel construction will be questioned. In the second case poor service performance will, in the long term, lead clients to move away from steel construction. In order to avoid this, industry as a whole needs to change its attitude to coating specifications. The professional teams, representing the client interests, need to rationalise specifications and recognise that coatings are not always necessary, but where they are they should be correctly specified. The contracting side of industry needs to recognise that coatings represent added value and are not just a necessary evil. They also need to acknowledge that the use of cheap, low quality products is a short term, false economy. This paper will consider the needs of all interested parties, from the steel producer through to the end client, and argue for a rationalised approach to coating specifications that recognise the importance of high quality materials and applications in producing an added value products. Note de contenu : - INTERESTED PARTIES : The steel producer - the coating manufacturer (CM) - the fabricator/contractor - the professional team - the client - coating standards - A NEW APPROACH : The CIM steel guide - the next step Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16912 [article]

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Polysulfide based coatings for environmental protection / T. Rees in SURFACE COATINGS INTERNATIONAL, Vol. 78, N° 1 (01/1995)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 78, N° 1 (01/1995) . - p. 19-24 Titre : Polysulfide based coatings for environmental protection Type de document : texte imprimé Auteurs : T. Rees, Auteur Année de publication : 1995 Article en page(s) : p. 19-24 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture  anticorrosion'  Liant  'Epoxyde  résine'  'Matériau  modifié'  'Sulfure  polymère'  Utilisation  Bâtiment Index. décimale : 667.9 Revêtements et enduits Résumé : Polysulfide coatings are used in a wide variety of environmental protection applications. The suitability of these coatings for such applications is explained by reference to the chemical structure of the polysulfide polymer. A description of the different cure chemistries available to these coatings is given. The benefits of using polysulfide polymers as modifiers for epoxy and alkyd coatings are also discussed. Case histories are used to illustrate the use of polysulfide coatings for chemical containment, potable water protection and corrosion prevention. Note de contenu : - LIQUID POLYSULFIDE POLYMERS - POLYSULFIDE BASED COATINGS : LP-R coatings - POLYSULFIDE MODIFIED EPOXY COATINGS : conventional liquid polysulfide modified epoxy systems (LP Epoxy) - ELP-3 modified epoxy systems (ELP-3 Epoxy) - ELP-612 Systems - liquid polysulfide alkyd coatings - CASE HISTORIES : secondary containment coatings for ground water protection - coatings for building protection - corrosion protection of strategic buildings Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16913 [article]

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Perfluorinated urethane mixture as a new additive for anti-corrosive paints. Part 1 : synthesis and evaluation / S. M. El-Sawy in SURFACE COATINGS INTERNATIONAL, Vol. 78, N° 1 (01/1995)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 78, N° 1 (01/1995) . - p. 25-29 Titre : Perfluorinated urethane mixture as a new additive for anti-corrosive paints. Part 1 : synthesis and evaluation Type de document : texte imprimé Auteurs : S. M. El-Sawy, Auteur ; M. Habo-Shosha, Auteur ; F. A. Abdel-Mohdy, Auteur ; N. A. Ibrahim, Auteur Année de publication : 1995 Article en page(s) : p. 25-29 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture  anticorrosion'  Adjuvant  'Uréthanne  polymère'  'Polymère  fluor'  Formulation  Feuil  'Propriété  physique'  'Absorption  eau' Index. décimale : 667.9 Revêtements et enduits Résumé : A perfluorinated urethane (PFU) mixture was laboratory prepared and incorporated in some laboratory prepared physical barrier anti-corrosive paint formulations. Testing and evaluation of the different paint films was carried out. It was found that incorporation of the PFU mixture as an additive in paint films increases their protective properties. Superior protective properties were obtained using 0.75-1.0g of the PFU mixture per 100g of (pigment-binder)phase. It is postulated that the increased protective action may be due to the hydrophobic properties attained by incorporating the PFU in the formulated paints, and the resulting teflon-like surface properties. Note de contenu : - EXPERIMENTAL PROCEDURE : preparation of the perfluorinated urethane (PFU) mixture - paint preparation - preparation of steel panels - corrosion resistance test - corrosion scratch test - hardness measurement - adhesion test - ductility test - acid and alkali resistance tests - water up-take measurement Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16914 [article]

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Painting of weathered hot-dip galvanised steel : its behaviour in cyclic ageing chambers / P. Merino in SURFACE COATINGS INTERNATIONAL, Vol. 78, N° 1 (01/1995)

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 78, N° 1 (01/1995) . - p. 30-35 Titre : Painting of weathered hot-dip galvanised steel : its behaviour in cyclic ageing chambers Type de document : texte imprimé Auteurs : P. Merino, Auteur ; C. Perez, Auteur ; A. Collazo, Auteur ; X. R. Novoa, Auteur ; M. Izquierdo, Auteur Année de publication : 1995 Article en page(s) : p. 30-35 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Anticorrosifs Anticorrosion Caoutchouc chloré Essais accélérés (technologie) Galvanisation Polyalkydes Revêtements -- Détérioration Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Note de contenu : - EXPERIMENTAL PROCEDUE : Substrate preparation - Paint systems - TEST METHODS : Adhesion - Blister formation - Degree of rusting - Failure at scrib mark - RESULTS AND DISCUSSION : Chlorinated rubber paint systems - Alkyd paint systems Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16916 [article]

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