<\/div>\n
L’essai d’arrachement<\/h2>
L’essai d’arrachement consiste \u00e0 coller une pastille m\u00e9tallique (un cylindre plat de 14 \u00e0 50 mm de diam\u00e8tre) sur la surface peinte au moyen d’un adh\u00e9sif structural \u00e0 haute r\u00e9sistance (cyanoacrylate, \u00e9poxy). Apr\u00e8s polym\u00e9risation, l’instrument applique \u00e0 la pastille une force de traction perpendiculaire croissante jusqu’\u00e0 la rupture ; le capteur de force int\u00e9gr\u00e9 mesure la force maximale et la convertit en pression (MPa), qui repr\u00e9sente l’adh\u00e9rence du rev\u00eatement. La zone arrach\u00e9e est ensuite examin\u00e9e pour d\u00e9terminer le type de rupture : coh\u00e9sive dans le rev\u00eatement, adh\u00e9sive \u00e0 l’interface, coh\u00e9sive dans l’adh\u00e9sif ou coh\u00e9sive dans le substrat. Les instruments \u00e9lectroniques (num\u00e9riques, motoris\u00e9s, \u00e0 vitesse de traction contr\u00f4l\u00e9e) remplacent progressivement les mod\u00e8les manuels \u00e0 levier. <\/p>
Cross-cut test<\/h2>
L’essai de quadrillage (ISO 2409, ASTM D3359 m\u00e9thode B) met en \u0153uvre des outils multilames qui tracent dans le rev\u00eatement un quadrillage d’entailles. Un ruban adh\u00e9sif normalis\u00e9 est appliqu\u00e9 sur le quadrillage puis retir\u00e9 rapidement ; l’examen visuel de la portion de rev\u00eatement d\u00e9coll\u00e9e, compar\u00e9e \u00e0 une \u00e9chelle de classification visuelle (0 = parfait, 5 = d\u00e9collement total), donne l’appr\u00e9ciation qualitative de l’adh\u00e9rence. Il existe des outils manuels \u00e0 couteau multilames avec peigne guid\u00e9 et des versions motoris\u00e9es pour la r\u00e9p\u00e9tabilit\u00e9. La m\u00e9thode est rapide et peu co\u00fbteuse, adapt\u00e9e aux contr\u00f4les de routine. <\/p>
Applications<\/h2>
Les essais d’adh\u00e9rence sont exig\u00e9s dans le contr\u00f4le qualit\u00e9 des rev\u00eatements anticorrosion sur structures m\u00e9talliques, dans la peinture automobile (contr\u00f4le de l’adh\u00e9rence entre primaire et base color\u00e9e, et entre base color\u00e9e et vernis), dans la galvanisation et le chromage, dans les rev\u00eatements polym\u00e8res pour ol\u00e9oducs et gazoducs, dans les rev\u00eatements de sols industriels, dans les protections intumescentes contre l’incendie et dans les \u00e9maux pour verre et c\u00e9ramique. La v\u00e9rification de l’adh\u00e9rence sur des lots repr\u00e9sentatifs est d’usage dans les cahiers des charges anticorrosion marins et offshore, soumis \u00e0 des examens formels de r\u00e9ception. <\/p>
Normes de r\u00e9f\u00e9rence<\/h2>
Les normes principales sont : l’ISO 4624 (essai d’adh\u00e9rence par arrachement), l’ASTM D4541 et l’ISO 16276-1 (\u00e9valuation de l’adh\u00e9rence). Pour le quadrillage : l’ISO 2409 (m\u00e9thode du quadrillage) et l’ASTM D3359 (m\u00e9thode A, entaille en X, et m\u00e9thode B, quadrillage). Pour la duret\u00e9 au crayon des rev\u00eatements : l’ISO 15184. L’\u00e9talonnage des instruments d’arrachement se r\u00e9alise avec des capteurs de force ma\u00eetres \u00e9talonn\u00e9s selon l’ISO 17025 et avec des pastilles de r\u00e9f\u00e9rence. Une pr\u00e9paration normalis\u00e9e (d\u00e9coupe du rev\u00eatement autour de la pastille, contr\u00f4le de la polym\u00e9risation de l’adh\u00e9sif, temp\u00e9rature ambiante) est critique pour la r\u00e9p\u00e9tabilit\u00e9. <\/p>
Crit\u00e8res de choix<\/h2>
Le choix de l’instrument d\u00e9pend du type de rev\u00eatement (industriel, automobile, d\u00e9coratif), de la force d’adh\u00e9rence attendue (les instruments courants travaillent de 1 \u00e0 25 MPa), des dimensions de la pastille (plus grande pour les rev\u00eatements \u00e9pais), de la portabilit\u00e9 (sur chantier, on pr\u00e9f\u00e8re des instruments compacts motoris\u00e9s \u00e0 capteur \u00e9lectronique) et des besoins d’acquisition de donn\u00e9es pour une \u00e9dition de rapports conforme. Des instruments combin\u00e9s pour l’arrachement et le quadrillage sont propos\u00e9s aux laboratoires qualit\u00e9 polyvalents. <\/p>","protected":false},"excerpt":{"rendered":"
Pull-off testers, cross-hatch testers et instruments pour la v\u00e9rification de l’adh\u00e9rence des peintures et rev\u00eatements.<\/p>\n","protected":false},"author":157040980,"featured_media":0,"parent":19365,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_wpcom_ai_launchpad_about_page":false,"_wpcom_ai_launchpad_gallery_page":false,"_wpcom_ai_launchpad_contact_page":false,"_wpcom_ai_launchpad_events_page":false,"_wpcom_ai_launchpad_video_page":false,"_wpcom_ai_launchpad_portfolio_piece":false,"footnotes":""},"class_list":["post-23031","page","type-page","status-publish","hentry"],"yoast_head":"\n
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proc\u00e9d\u00e9s de collage et de peinture utilis\u00e9s dans la production de diff\u00e9rents types de produits. Gr\u00e2ce aux technologies avanc\u00e9es utilis\u00e9es dans les instruments de mesure d'adh\u00e9rence modernes, il est possible d'effectuer des\u2026","rel":"","context":"Article similaire","block_context":{"text":"Article similaire","link":""},"img":{"alt_text":"roder misura di adesione icona common","src":"https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2019\/05\/icona_adesione.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/roder.it\/fr\/wp-json\/wp\/v2\/pages\/23031","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/roder.it\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/roder.it\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/roder.it\/fr\/wp-json\/wp\/v2\/users\/157040980"}],"replies":[{"embeddable":true,"href":"https:\/\/roder.it\/fr\/wp-json\/wp\/v2\/comments?post=23031"}],"version-history":[{"count":3,"href":"https:\/\/roder.it\/fr\/wp-json\/wp\/v2\/pages\/23031\/revisions"}],"predecessor-version":[{"id":23034,"href":"https:\/\/roder.it\/fr\/wp-json\/wp\/v2\/pages\/23031\/revisions\/23034"}],"up":[{"embeddable":true,"href":"https:\/\/roder.it\/fr\/wp-json\/wp\/v2\/pages\/19365"}],"wp:attachment":[{"href":"https:\/\/roder.it\/fr\/wp-json\/wp\/v2\/media?parent=23031"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"banner](\"https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/banner_technical_support_choose_products-1024x213.png\")