{"id":636,"date":"2015-05-16T15:05:10","date_gmt":"2015-05-16T13:05:10","guid":{"rendered":"https:\/\/www.la-maison-naturelle.com\/blog\/?p=636"},"modified":"2023-08-04T20:07:36","modified_gmt":"2023-08-04T18:07:36","slug":"protection-des-structures-en-acier-la-preparation-de-surface","status":"publish","type":"post","link":"https:\/\/www.la-maison-naturelle.com\/blog\/protection-des-structures-en-acier-la-preparation-de-surface\/","title":{"rendered":"Protection des structures en acier : la pr\u00e9paration de surface"},"content":{"rendered":"<table style=\" width=\"100%\",max-width=\"839\">\n<tbody>\n<tr>\n<td colspan=\"3\"><a href=\"https:\/\/www.la-maison-naturelle.com\/\"><img decoding=\"async\" class=\"wp-image-5568 aligncenter\" src=\"https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/Dark-Green-and-Gray-Professional-and-Clean-E-Commerce-Email-Header-300x35.png\" alt=\"\" width=\"839\" srcset=\"https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/Dark-Green-and-Gray-Professional-and-Clean-E-Commerce-Email-Header-300x35.png 300w, https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/Dark-Green-and-Gray-Professional-and-Clean-E-Commerce-Email-Header-1024x119.png 1024w, https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/Dark-Green-and-Gray-Professional-and-Clean-E-Commerce-Email-Header-768x89.png 768w, https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/Dark-Green-and-Gray-Professional-and-Clean-E-Commerce-Email-Header-1536x178.png 1536w, https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/Dark-Green-and-Gray-Professional-and-Clean-E-Commerce-Email-Header.png 1578w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.la-maison-naturelle.com\/5260-materiaux-et-bricolage\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-5565\" src=\"https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/73a5f09c-2ef6-46dd-90d1-9cf73599e16b-1-249x300.png\" alt=\"Mat\u00e9riaux et bricolage\" width=\"249\" height=\"300\" srcset=\"https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/73a5f09c-2ef6-46dd-90d1-9cf73599e16b-1-249x300.png 249w, https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/73a5f09c-2ef6-46dd-90d1-9cf73599e16b-1.png 397w\" sizes=\"auto, (max-width: 249px) 100vw, 249px\" \/><\/a><\/td>\n<td><a href=\"https:\/\/www.la-maison-naturelle.com\/5266-amenagement-du-jardin\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-5564\" src=\"https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/9224811f-6da5-4d4d-8634-e9a2517a9565-1-249x300.png\" alt=\"Jardin et ext\u00e9rieur\" width=\"249\" height=\"300\" srcset=\"https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/9224811f-6da5-4d4d-8634-e9a2517a9565-1-249x300.png 249w, https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/9224811f-6da5-4d4d-8634-e9a2517a9565-1.png 397w\" sizes=\"auto, (max-width: 249px) 100vw, 249px\" \/><\/a><\/td>\n<td><a href=\"https:\/\/www.la-maison-naturelle.com\/5267-interieur-et-decoration\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-5563\" src=\"https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/b9400ea8-440a-4a4a-8db6-682fde3f9652-1-249x300.png\" alt=\"Int\u00e9rieur et d\u00e9coration\" width=\"249\" height=\"300\" srcset=\"https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/b9400ea8-440a-4a4a-8db6-682fde3f9652-1-249x300.png 249w, https:\/\/www.la-maison-naturelle.com\/blog\/wp-content\/uploads\/2012\/05\/b9400ea8-440a-4a4a-8db6-682fde3f9652-1.png 397w\" sizes=\"auto, (max-width: 249px) 100vw, 249px\" \/><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>La pr\u00e9paration de la surface en acier contribue \u00e0 renforcer l&rsquo;adh\u00e9rence de la finition ainsi que l&rsquo;efficacit\u00e9 de la protection. Elle consiste \u00e0 retirer pr\u00e9alablement la calamine et la rouille \u00e0 l&rsquo;aide de diverses m\u00e9thodes.<\/p>\n<h2>L&rsquo;exposition aux intemp\u00e9ries, le d\u00e9capage m\u00e9canique et les pistolets de d\u00e9calaminage<\/h2>\n<p>L&rsquo;exposition aux intemp\u00e9ries est une \u00e9tape entrant naturellement dans le processus de fabrication de l&rsquo;acier. Elle se r\u00e9v\u00e8le particuli\u00e8rement efficace en raison de la nature m\u00eame de la calamine qui s&rsquo;effrite \u00e0 l&rsquo;air libre. Pour \u00eatre efficace, il est toutefois n\u00e9cessaire de prendre en compte l&rsquo;\u00e9paisseur de la calamine, le climat local ou la forme ainsi que l&rsquo;\u00e9paisseur de la structure. Ainsi, un d\u00e9lai allant de six mois \u00e0 cinq ans est n\u00e9cessaire pour retirer la majeure partie de la calamine sur des plaques en acier de 9 mm. L&rsquo;exposition aux intemp\u00e9ries n&rsquo;est donc pas recommand\u00e9e en tant que m\u00e9thode de pr\u00e9paration des structures en acier. Concernant le <a href=\"https:\/\/www.la-maison-naturelle.com\/4915-decapants\">d\u00e9capage<\/a>, la m\u00e9thode consiste \u00e0 utiliser des brosses et des grattoirs m\u00e9caniques pour retirer la rouille ainsi que la calamine pr\u00e9sente \u00e0 la surface de l&rsquo;acier. Le brossage, le burinage ou le grattage sont \u00e9galement possibles bien que ces m\u00e9thodes ne pr\u00e9sentent qu&rsquo;un niveau d&rsquo;efficacit\u00e9 r\u00e9duit. Quant \u00e0 l&rsquo;utilisation de pistolets de d\u00e9calaminage, elle est uniquement destin\u00e9e au traitement des \u00e9crous, des boulons ou des t\u00eates de rivet. Cette m\u00e9thode se r\u00e9v\u00e8le relativement lente et inefficace sur la rouille adh\u00e9rente ou la calamine mince.<\/p>\n<h2>Le br\u00fblage au chalumeau, le d\u00e9capage \u00e0 l&rsquo;acide et le sablage<\/h2>\n<p>Le br\u00fblage au chalumeau consiste \u00e0 passer la structure en acier au chalumeau oxyac\u00e9tyl\u00e9nique. La calamine se d\u00e9tache alors par dilatation diff\u00e9rentielle, ce qui permet d&rsquo;obtenir des r\u00e9sultats satisfaisants. Cette m\u00e9thode est cependant tr\u00e8s lente et ne peut \u00eatre appliqu\u00e9e sur les structures de moins de 5 mm d&rsquo;\u00e9paisseur en raison du risque de d\u00e9formation. Elle n&rsquo;est utilis\u00e9e qu&rsquo;en de rares cas. Pour ce qui est du d\u00e9capage \u00e0 l&rsquo;acide, il s&rsquo;agit d&rsquo;une m\u00e9thode d&rsquo;usine adopt\u00e9e avant la mise en oeuvre de l&rsquo;acier. Ce proc\u00e9d\u00e9 consiste \u00e0 immerger la structure dans un bain d&rsquo;acide chlorhydrique ou sulfurique chaud avant de la rincer et de la tremper dans une solution d&rsquo;acide phosphorique. Cette technique de pr\u00e9paration est l&rsquo;une des plus efficaces et des plus abordables pour retirer la couche de rouille et de calamine \u00e0 la surface de l&rsquo;acier. Le d\u00e9capage \u00e0 froid se r\u00e9v\u00e8le toutefois inefficace. Enfin, pour ce qui est du sablage, il s&rsquo;agit d&rsquo;un proc\u00e9d\u00e9 offrant une efficacit\u00e9 optimale dans la pr\u00e9paration des structures en acier. Il consiste \u00e0 utiliser de la grenaille ou des billes de fonte qui sont projet\u00e9es sur la surface du m\u00e9tal. Cette m\u00e9thode permet d&rsquo;obtenir une surface id\u00e9ale pour <a href=\"https:\/\/www.la-maison-naturelle.com\/3096-peinture-pour-metal\">l&rsquo;application d&rsquo;une couche de peinture<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":5,"featured_media":3493,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-636","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-fiches-pratiques"],"_wp_attached_file":null,"_wp_attachment_metadata":null,"_wp_attachment_context":null,"_wp_attachment_image_alt":null,"_hf_settings":null,"hf_message_success":null,"hf_message_invalid_email":null,"hf_message_required_field_missing":null,"hf_message_error":null,"_menu_item_type":null,"_menu_item_menu_item_parent":null,"_menu_item_object_id":null,"_menu_item_object":null,"_menu_item_target":null,"_menu_item_classes":null,"_menu_item_xfn":null,"_menu_item_url":null,"_yoast_wpseo_primary_category":"","_thumbnail_id":"3493","_oembed_26d84b2c06432105b0a19987ae029a71":null,"_oembed_43e9e2dfde1b9b4ed91c9711026b7ef9":null,"_oembed_1fe1564764edbddc3b61e81acf52be88":null,"_oembed_df60f474cd845141e7ce6596d101e4a0":null,"_oembed_825e674795e2435c0bc66eb08e5d2c8b":null,"_oembed_time_825e674795e2435c0bc66eb08e5d2c8b":null,"_oembed_e917352ff4cc21ea91383201eeaa08cf":null,"_oembed_2363c16c972791c33e283320dc564fce":null,"_oembed_cc9ad5b5073a84776f6a62e33e6c7498":null,"_oembed_time_cc9ad5b5073a84776f6a62e33e6c7498":null,"_oembed_305147fcf4b856de518466e695c209cd":null,"_oembed_8517a877084ae01a5296813ee1d16a2b":null,"_oembed_2741f1556b243e68379198f98ba7f864":null,"_oembed_c3ffa24981451396c950ece2129da0f6":null,"_oembed_6f9091ebe2f3f5fcb5698ba6f4b41477":null,"_wp_old_slug":null,"_oembed_e4fb0f68ba12b85e9e231afe151ba12a":null,"_oembed_3c60e98bd703e617e67f5bbb3b97424d":null,"_oembed_bb060374498dcf40cb6068efe4be87e1":null,"_oembed_d0403e1e71c3a29020bd546b159480f1":null,"_oembed_b030ff17fbbbf8661c59c2ab8ff289eb":null,"_oembed_5cec699ba0631c6c0e4ba4f6af5f228e":null,"_oembed_b06a67f278b90cf4e8dd17cb12fe67b0":null,"_oembed_8e190e4fea2256f17420434651556236":null,"_oembed_b5ded119f1337916a0fc64d2ad85c95f":null,"_oembed_d9364a7a81be31c01415da2c50a48932":null,"_oembed_738cafa36d51a58e5ae3e458aa8f7584":null,"_oembed_ebcab5184b6b321b28efbcbec079859b":null,"_oembed_3dd9e35c2b7b268070e74da5b89cf937":null,"_oembed_e14b167b493e311a1c4e2aab38a463e8":null,"_oembed_dc8f7d108b38f3f0c2e0785b8bc46cae":null,"_oembed_55cf1c5142884afed312c2666bf27520":null,"_oembed_2292333bf03a956b4b61afafeff6bca0":null,"_oembed_82a986a6b900856fec23169de03a0038":null,"_oembed_4048ded025352b83569104210074165a":null,"_oembed_033b42b1af757abc39e4487233cee7f5":null,"_oembed_aec1d50f2b159366be8e37e94b201be1":null,"_oembed_0adc8480b2fcadf9a1733f572ce3d3f8":null,"_yoast_wpseo_title":null,"_yoast_wpseo_focuskw":null,"_yoast_wpseo_linkdex":null,"_yoast_wpseo_metadesc":null,"_yoast_wpseo_wordproof_timestamp":"","_tpl_archive_meta_key":null,"_form":null,"_mail":null,"_mail_2":null,"_messages":null,"_additional_settings":null,"_locale":null,"_wp_old_date":"2022-05-16","_edit_last":"5","_wpb_vc_js_status":"false","_yoast_wpseo_estimated-reading-time-minutes":"3","_edit_lock":"1691172371:5","_yoast_wpseo_content_score":"30","yoast_head":"<!-- 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