Construction in wood: influence of the preservative wood based on hydrosolubles salts in the corrosion of metal fasteners
DOI:
https://doi.org/10.3989/ic.2007.v59.i506.506Keywords:
corrosion, fasteners, wood, preservative treated saltsAbstract
The hydrosoluble salts are one of the products used for the treatment in depth of the wood that come using for decades with excellent results. Nevertheless, realized investigations, principally with CCA, for Cross, J. and Bailey, G. (1989), among others, demonstrates that it can be corrosive for the metallic fasteners used in the construction in wood, because of some of the chemical products that they contain and the protection system with which Autoclave is applied.
In Spain, the Real Decreto 1406/1989, that prohibits the marketing and the use of compounds of arsenic from 30/06/2004, except exceptions, has forced to the companies to replace definitively the products used up to this moment that were containing toxic substances as the chrome and the arsenic (CCB, CCA, etc.) for products consisted of other not toxic substances, as the ACQ (salts of quaternary ammonium). Of these new products scanty information is had on their behaviour and specially, on their compatibility with the metals which are made the fasteners used for the current construction in wood.
This work does a comparative study of the corrosive behaviour of three hydrosoluble protectors (CCA, CCB and ACQ) towards different metals (galvanized steel and stainless steel). The evaluation has been realized across the result of a test of accelerated corrosion in the short time in artificial atmosphere of rapid corrosion. The conclusions of the work lead to affirm that the treatments of wood hydrosolubles accelerate the speed of corrosion of the metals, though with some differences between them.
Downloads
References
(1) Baker A. J.: «Corrosion of Metal in Wood Products». Procs. 1st. Int. Conf. Durability of Building Materials and Components, organisers ASTM, Published as ASTM Special PU: nº 691 (august, 1978), pp. 981-993, Ottawa.
(2) BUILDING RESEARCH ESTABLISHMENT (BRE): «Corrosion of metals by wood», Building Research Establishment Digest, vol. 301 (september 1985), pp. 1- 4.
(3) Callaghan, B. C.: «The dangers of timber and metal in contact», Construction in Southern Africa vol dec (december 1969), pp. 53-63.
(4) Cross, J.; Bailey, G.: «Research unravels mystery of corroded fasteners», Building Trades JNL. vol. 198, nº 5827 (october 1989), pp. 28-32.
(5) GREATER LONDON COUNCIL: «Corrosion of metal fasteners used in conjuntion with preservative treated timbers», Development and Materials Bulletin, vol. 87 (2nd Series), nº 2 (july 1975), pp. 1-5.
(6) GREATER LONDON COUNCIL: «Corrosion of zinc coated steel fasteners in conjuntion with preservative treated timbers», Development and Materials Bulletin, vol. 91 (2nd Series), nº 5 (January 1976), pp. 1-6.
(7) GREATER LONDON COUNCIL: «Corrosion of metal fasteners used in conjuntion with CCA preservative treated timbers», Development and Materials Bulletin, vol. 135 (2nd Series), nº 4 (December 1981), pp. 1-3.
(8) Watson, R. W.: «Corrosion of metals in Preserved Wood», Supplement to Timber Trades Jnl. 16th (oct., 1976), 11+17.
(9) Whitney R. S.; Fry, J.I.: «Corrosion problems in the New Zealand building Industry», Corrosion Association Conference, vol. 16 (1976), pp.1- 10.
(10) Whitney R.S.: «Timber Fasteners and Potential Problems of Corrosion», Building Research Association of New Zealand, Preprint, nº 10 (january.1979), 26 p.
(11) AENOR- “Corrosión” (recopilación de Normas UNE). Madrid: AENOR N. A. 71.970, 1999.
(12) Une-En ISO 7384 (1995): “Ensayos de corrosión en atmósfera artificial, Prescripciones generales” (ISO 7384:1986).
(13) UNE 112017 (1992): “Recubrimientos metálicos. Ensayos de corrosión en atmósferas artificiales. Ensayos de niebla salina”. (ISO 9227: 1990).
(14) UNE- EN ISO 10289 (2001): “Métodos de ensayo de corrosión de recubrimientos metálicos no orgánicos sobre sustratos metálicos. Clasifi cación de probetas y piezas de protección sometidas a ensayos de corrosión” (ISO 10289).
(15) ISO 8407: “Metales y Aleaciones. Procedimientos para eliminar los productos de corrosión desde las probetas de ensayos de corrosión”.
(16) Astm G1-81 (1981): “Standard Practice for Preparing, Cleaning, and Evaluating Corrosion Test Specimens”.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2007 Consejo Superior de Investigaciones Científicas (CSIC)
This work is licensed under a Creative Commons Attribution 4.0 International License.
© CSIC. Manuscripts published in both the print and online versions of this journal are the property of the Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.
All contents of this electronic edition, except where otherwise noted, are distributed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence. You may read the basic information and the legal text of the licence. The indication of the CC BY 4.0 licence must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the final version of the work produced by the publisher, is not allowed.
