{"id":79,"date":"2022-05-17T13:25:00","date_gmt":"2022-05-17T11:25:00","guid":{"rendered":"http:\/\/185.50.52.14\/?page_id=79"},"modified":"2024-06-18T14:11:47","modified_gmt":"2024-06-18T12:11:47","slug":"sherardisation","status":"publish","type":"page","link":"https:\/\/lrd-ts.com\/?page_id=79","title":{"rendered":"Sh\u00e9rardisation"},"content":{"rendered":"\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#00b2a9;font-size:30px\"><strong>SH\u00c9RARDISATION<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-video\"><video controls src=\"\/wp-content\/uploads\/2022\/04\/Film_Sherardisation_STFR_720p_Youtube.mp4\"><\/video><\/figure>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\">Invent\u00e9e au <strong>19<sup>\u00e8me<\/sup> si\u00e8cle<\/strong> par Sherard Cowper Cowles, la Sh\u00e9rardisation est un proc\u00e9d\u00e9 thermochimique anticorrosion de diffusion et p\u00e9n\u00e9tration de zinc dans l\u2019acier.<\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\">La sh\u00e9rardisation permet d&rsquo;obtenir une \u00e9paisseur uniforme et constante sur l&rsquo;ensemble des pi\u00e8ces y compris sur celles de formes complexes ou pour des endroits difficiles d&rsquo;acc\u00e8s (tubes, creux&#8230;) On obtient ce rev\u00eatement par un proc\u00e9d\u00e9 thermochimique de diffusion de zinc \u00e0 la surface des pi\u00e8ces en m\u00e9tal ferreux (fer, acier, fonte) lorsque celles-ci sont chauff\u00e9es (<strong>400\u00b0C<\/strong>) en pr\u00e9sence de poussi\u00e8re de zinc et d\u2019un mat\u00e9riau inerte tel que le sable.<\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\">Le proc\u00e9d\u00e9 se d\u00e9roule en phase solide en caisson ferm\u00e9 anim\u00e9 d\u2019une rotation lente. Une passivation sans chrome VI est r\u00e9alis\u00e9e apr\u00e8s sh\u00e9rardisation.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>L&rsquo;entreprise LRD-TS est la seule entreprise en France \u00e0 proposer ce type de traitement.<\/strong><\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#00b2a9;font-size:25px\"><u><strong>Avantages<\/strong><\/u><\/p>\n\n\n\n<ul id=\"block-6b57b320-b909-4e2a-9814-5f7b03945d11\" class=\"has-medium-font-size wp-block-list\">\n<li><strong>Tr\u00e8s bonne r\u00e9sistance<\/strong> \u00e0 la corrosion et \u00e0 l\u2019abrasion, coloris gris fonc\u00e9.<\/li>\n\n\n\n<li>\u00c9paisseur <strong>uniforme<\/strong> et <strong>constante<\/strong>, m\u00eame dans les parties creuses.<\/li>\n\n\n\n<li><strong>Adh\u00e9rence exceptionnelle<\/strong> li\u00e9e au ph\u00e9nom\u00e8ne de diffusion.<\/li>\n\n\n\n<li><strong>R\u00e9sistance<\/strong> aux chocs et aux rayures. Effet sacrificiel du zinc.<\/li>\n\n\n\n<li>Am\u00e9lioration de la <strong>duret\u00e9 superficielle<\/strong> (471HV).<\/li>\n\n\n\n<li>Tenue au brouillard salin : <strong>400 heures<\/strong> en classe <strong>15 &amp;<\/strong> <strong>800 heures<\/strong> en classe 30.<\/li>\n\n\n\n<li>Absence de fragilisation par l\u2019hydrog\u00e8ne.<\/li>\n\n\n\n<li><strong>Excellente base d\u2019accrochage<\/strong> pour les peintures, l\u2019adh\u00e9risation de caoutchouc.<\/li>\n\n\n\n<li><strong>Traitement sans chrome VI<\/strong>, conforme aux exigences de la directive ROHS.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"6696\" height=\"2848\" src=\"https:\/\/lrd-ts.com\/wp-content\/uploads\/2022\/05\/LRD_Photoshoot_07_Pannel_Sherardise.jpg\" alt=\"\" class=\"wp-image-1063\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>Classe de rev\u00eatement<\/strong> &#8211; <br>Suivant Norme NF-EN ISO 17668<\/td><td><strong>Epaisseur Moyenne<\/strong> <strong>\u00b5m<\/strong><\/td><td><strong>Epaisseur Minimale<\/strong> <strong>\u00b5m<\/strong><\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Classe 45<\/td><td>50<\/td><td>45<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Classe 30<\/td><td>40<\/td><td>30<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Classe 15<sup>*<\/sup><\/td><td>20<\/td><td>15<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#071d49;font-size:16px\">*<em>Pour la classe 15 uniquement, les vis et \u00e9crous standards peuvent \u00eatre trait\u00e9s sans modification de c\u00f4tes.<\/em><\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\">La dur\u00e9e de vie d\u2019un rev\u00eatement de zinc pour une atmosph\u00e8re donn\u00e9e est proportionnelle \u00e0 son \u00e9paisseur.<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#00b2a9;font-size:25px\"><strong><u>Rappel : Processus de sh\u00e9rardisation<\/u><\/strong><\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"567\" height=\"1024\" data-id=\"1420\" src=\"https:\/\/lrd-ts.com\/wp-content\/uploads\/2024\/06\/Infographie_sherardisation_FR-567x1024.png\" alt=\"\" class=\"wp-image-1420\" srcset=\"https:\/\/lrd-ts.com\/wp-content\/uploads\/2024\/06\/Infographie_sherardisation_FR-567x1024.png 567w, https:\/\/lrd-ts.com\/wp-content\/uploads\/2024\/06\/Infographie_sherardisation_FR-166x300.png 166w, https:\/\/lrd-ts.com\/wp-content\/uploads\/2024\/06\/Infographie_sherardisation_FR-768x1387.png 768w, https:\/\/lrd-ts.com\/wp-content\/uploads\/2024\/06\/Infographie_sherardisation_FR-851x1536.png 851w, https:\/\/lrd-ts.com\/wp-content\/uploads\/2024\/06\/Infographie_sherardisation_FR.png 942w\" sizes=\"auto, (max-width: 567px) 100vw, 567px\" \/><\/figure>\n<\/figure>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#00b2a9;font-size:25px\"><strong><u>Applications<\/u><\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\"><strong>Boulonnerie \u2013 Visserie :<\/strong> Standard et haute r\u00e9sistance type 10.9-12.9. Pas d&rsquo;effet de pointe, l&rsquo;\u00e9paisseur est identique en fond comme en cr\u00eate de filet. Le taraudage des \u00e9crous apr\u00e8s traitement n&rsquo;est pas n\u00e9cessaire. R\u00e9sistance aux chocs lors du vissage. Absence de fragilisation. DTU 31.2 &#8211; Norme NF P 21-204.<\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\"><strong>Cha\u00eenes :<\/strong> Conservation des r\u00e9sistances m\u00e9caniques. Absence de risque d&rsquo;\u00e9caillage gr\u00e2ce \u00e0 la bonne adh\u00e9rence du rev\u00eatement.<\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\"><strong>Rondelles et pi\u00e8ces plates :<\/strong> Uniformit\u00e9 du rev\u00eatement, pas de collage des pi\u00e8ces les unes aux autres lors du traitement.<\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\"><strong>Chevilles m\u00e9talliques : <\/strong>Tenue du rev\u00eatement, m\u00eame apr\u00e8s assemblage.<\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\"><strong>Pointes et clous :<\/strong> Pas d&rsquo;alt\u00e9ration de la protection par le choc du marteau. Uniformit\u00e9 du rev\u00eatement, pas d&rsquo;effet de goutte. Traitement particuli\u00e8rement bien adapt\u00e9 du fait du proc\u00e9d\u00e9 \u00e0 sec.<\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\"><strong>Adh\u00e9risation et collage :<\/strong> Caoutchouc et pi\u00e8ces antivibratoires.<\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\"><strong>Pi\u00e8ces d&rsquo;ancrage :<\/strong> Conservation des tenues m\u00e9caniques des pi\u00e8ces.<\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\"><strong>Raccords fonte :<\/strong> Bonne adh\u00e9rence sur la fonte.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" src=\"http:\/\/lrd-ts.com\/wp-content\/uploads\/2022\/05\/DSC00231-6.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" src=\"http:\/\/lrd-ts.com\/wp-content\/uploads\/2022\/05\/DSC00296-1.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" src=\"http:\/\/lrd-ts.com\/wp-content\/uploads\/2022\/05\/DSC00262.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" src=\"http:\/\/lrd-ts.com\/wp-content\/uploads\/2022\/05\/DSC00257_rogner-1.jpg\" alt=\"\"\/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\"><strong>La Sh\u00e9rardisation est utilis\u00e9e partout o\u00f9 la corrosion est intense (B\u00e2timent, ferroviaire, automobile&#8230;)<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-full is-style-default\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/lrd-ts.com\/wp-content\/uploads\/2022\/06\/AdobeStock_352436024-1.jpeg\" alt=\"\" class=\"wp-image-1299\" title=\"Illustration - Cables haute tension\"\/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-full is-style-default\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"668\" src=\"https:\/\/lrd-ts.com\/wp-content\/uploads\/2022\/06\/AdobeStock_288964284-1.jpeg\" alt=\"\" class=\"wp-image-1300\" title=\"Illustration - Plateforme p\u00e9troli\u00e8re\"\/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-full is-style-default\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/lrd-ts.com\/wp-content\/uploads\/2022\/06\/AdobeStock_68186627.jpeg\" alt=\"\" class=\"wp-image-1313\" title=\"Illustration - passerelle\"\/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-full is-style-default\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"660\" src=\"https:\/\/lrd-ts.com\/wp-content\/uploads\/2022\/06\/AdobeStock_181316427-1.jpeg\" alt=\"\" class=\"wp-image-1301\" title=\"Illustration - Autoroute en mouvement\"\/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\">Le b\u00e2timent et le g\u00e9nie civil, l&rsquo;industrie navale, la p\u00e9trochimie, l&rsquo;offshore, la construction marine et sous-marine, l&rsquo;automobile, le mobilier urbain&#8230; Autant d&rsquo;industries ou de secteurs d&rsquo;activit\u00e9s utilisateurs de pi\u00e8ces Sh\u00e9rardis\u00e9es.<\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\">Adapt\u00e9e aux exigences de la tropicalisation, la Sh\u00e9rardisation est aussi pr\u00e9conis\u00e9e pour les r\u00e9gions chaudes et humides ou \u00e0 fortes intemp\u00e9ries climatiques.<\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\">Par sa mise en \u0153uvre et la protection qu&rsquo;elle conf\u00e8re aux produits, la sh\u00e9rardisation s&rsquo;av\u00e8re \u00eatre particuli\u00e8rement adapt\u00e9e aux pi\u00e8ces de s\u00e9curit\u00e9.<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#00b2a9;font-size:25px\"><strong>Les couches m\u00e9talliques sur une pi\u00e8ce sh\u00e9rardis\u00e9e<\/strong><\/p>\n\n\n\n<p class=\"has-text-color has-medium-font-size wp-block-paragraph\" style=\"color:#071d49\">Les aciers au carbone non alli\u00e9, les aciers HR, la mati\u00e8re fritt\u00e9e, le fer et la fonte se pr\u00eatent tr\u00e8s bien \u00e0 la sh\u00e9rardisation. La sh\u00e9rardisation forme deux couches d&rsquo;alliage fer-zinc, la couche gamma en partie diffus\u00e9e qui contient 21 \u00e0 28 % de fer et la couche compacte delta qui renferme 8 \u00e0 10 % de fer.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" src=\"http:\/\/lrd-ts.com\/wp-content\/uploads\/2022\/05\/Capture_2-1.png\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\" style=\"font-size:15px\"><\/p>\n\n\n\n<figure class=\"wp-block-table aligncenter is-style-stripes has-medium-font-size\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>Couche delta d&rsquo;alliage FE\/ZN<\/strong>                                 <\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>    Fer pur ou fonte             <\/strong><\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Zn # 93%<\/td><td class=\"has-text-align-center\" data-align=\"center\">25 \u00b5 env.<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Couche gamma<\/td><td class=\"has-text-align-center\" data-align=\"center\">               15 \u00b5 env.                    <\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>SH\u00c9RARDISATION Invent\u00e9e au 19\u00e8me si\u00e8cle par Sherard Cowper Cowles, la Sh\u00e9rardisation est un proc\u00e9d\u00e9 thermochimique anticorrosion de diffusion et p\u00e9n\u00e9tration de zinc dans l\u2019acier. La sh\u00e9rardisation permet d&rsquo;obtenir une \u00e9paisseur uniforme et constante sur l&rsquo;ensemble des pi\u00e8ces y compris sur celles de formes complexes ou pour des endroits difficiles d&rsquo;acc\u00e8s (tubes, creux&#8230;) On obtient ce [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-79","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/lrd-ts.com\/index.php?rest_route=\/wp\/v2\/pages\/79","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lrd-ts.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/lrd-ts.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/lrd-ts.com\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/lrd-ts.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=79"}],"version-history":[{"count":94,"href":"https:\/\/lrd-ts.com\/index.php?rest_route=\/wp\/v2\/pages\/79\/revisions"}],"predecessor-version":[{"id":1428,"href":"https:\/\/lrd-ts.com\/index.php?rest_route=\/wp\/v2\/pages\/79\/revisions\/1428"}],"wp:attachment":[{"href":"https:\/\/lrd-ts.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=79"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}