{"id":2265,"date":"2026-03-10T06:00:16","date_gmt":"2026-03-10T06:00:16","guid":{"rendered":"https:\/\/zhhmarinefender.com\/?p=2265"},"modified":"2026-03-10T06:00:16","modified_gmt":"2026-03-10T06:00:16","slug":"maintain-foam-filled-fenders","status":"publish","type":"post","link":"https:\/\/zhhmarinefender.com\/pt\/maintain-foam-filled-fenders\/","title":{"rendered":"Como fazer a manuten\u00e7\u00e3o de para-lamas preenchidos com espuma?"},"content":{"rendered":"

Para manter defensas de espuma marinhas<\/a><\/strong> Em bom estado, voc\u00ea precisa verificar a cada tr\u00eas meses se h\u00e1 danos na superf\u00edcie, remover detritos e proteg\u00ea-los dos raios UV reaplicando uma camada de poliuretano. Use sab\u00e3o neutro e \u00e1gua para limpar e evite lavadoras de alta press\u00e3o e produtos qu\u00edmicos fortes. Mantenha-os longe de objetos pontiagudos e, se necess\u00e1rio, use redes de prote\u00e7\u00e3o para pneus.<\/p>\n

Por que a manuten\u00e7\u00e3o \u00e9 importante<\/h2>\n

Os para-lamas preenchidos com espuma operam em condi\u00e7\u00f5es extremas. Eles enfrentam \u00e1gua salgada, radia\u00e7\u00e3o UV e impactos mec\u00e2nicos repetidos diariamente. A manuten\u00e7\u00e3o determina sua durabilidade e desempenho.<\/p>\n

A tabela abaixo compara para-lamas com e sem manuten\u00e7\u00e3o. Os dados foram extra\u00eddos do PIANC (2002) e de nossos registros internos de servi\u00e7o (2015\u20132025, n = 240 unidades).<\/p>\n\n\n\n\n\n\n\n
M\u00e9trica de desempenho<\/td>\nPara-lama em bom estado<\/td>\nPara-lama sem manuten\u00e7\u00e3o<\/td>\nFonte<\/td>\n<\/tr>\n
Vida \u00fatil esperada<\/td>\n18 a 25 anos<\/td>\n10 a 15 anos<\/td>\nPIANC 2002, Tabela 4.3<\/td>\n<\/tr>\n
Reten\u00e7\u00e3o da absor\u00e7\u00e3o de energia (ap\u00f3s 5 anos)<\/td>\n90% ou superior<\/td>\n60 a 75%<\/td>\nteste de tipo ISO 17357<\/td>\n<\/tr>\n
Condi\u00e7\u00e3o da pele<\/td>\nLiso, sem rachaduras<\/td>\nRachado ou com corros\u00e3o<\/td>\nGrau Visual VGS-3<\/td>\n<\/tr>\n
Frequ\u00eancia de reparos de emerg\u00eancia<\/td>\nA cada 7 a 10 anos<\/td>\nA cada 3 a 4 anos<\/td>\nRegistros Zhonghaihang (n=240)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Nota sobre os valores de vida \u00fatil: Os intervalos acima s\u00e3o baseados nas Diretrizes da PIANC para o Projeto de Sistemas de Defensas (2002). Eles representam o desempenho t\u00edpico em condi\u00e7\u00f5es normais de opera\u00e7\u00e3o. A vida \u00fatil real depende do ambiente de instala\u00e7\u00e3o, do tipo de embarca\u00e7\u00e3o e da frequ\u00eancia de manuten\u00e7\u00e3o. Os resultados individuais podem variar.<\/p>\n

\"Por<\/p>\n

Guia de Manuten\u00e7\u00e3o Passo a Passo<\/h2>\n

Os passos abaixo aplicam-se a para-lamas padr\u00e3o preenchidos com espuma, com n\u00facleos de espuma EVA ou PE e revestimentos externos de poliuretano ou poliureia. Para-lamas pneum\u00e1ticos e s\u00f3lidos. Os para-lamas de borracha t\u00eam diferentes requisitos de manuten\u00e7\u00e3o.<\/a><\/strong>. Consulte a ficha t\u00e9cnica do produto correspondente para obter informa\u00e7\u00f5es sobre esses tipos.<\/p>\n

Passo 01: Re\u00fana seus materiais<\/h3>\n
    \n
  • Escova de cerdas macias ou escova para lavagem de carros (rigidez m\u00e1xima das cerdas: 0,3 mm)<\/li>\n
  • Detergente neutro (pH 6 a 8). N\u00e3o utilize alvejante ou produtos de limpeza alcalinos fortes.<\/li>\n
  • Lavadora de baixa press\u00e3o (m\u00e1x. 80 bar) ou uma mangueira de jardim padr\u00e3o.<\/li>\n
  • Dois a tr\u00eas panos de microfibra<\/li>\n
  • Graxa de l\u00edtio de grau mar\u00edtimo para ferragens (grau resistente \u00e0 corros\u00e3o)<\/li>\n
  • Aten\u00e7\u00e3o: nunca utilize produtos de limpeza \u00e0 base de solventes. O poliuretano \u00e9 sens\u00edvel a solventes org\u00e2nicos.<\/li>\n<\/ul>\n

    Passo 02: Enx\u00e1gue o para-lama<\/h3>\n
      \n
    • Enx\u00e1gue toda a superf\u00edcie com \u00e1gua limpa.<\/li>\n
    • Preste aten\u00e7\u00e3o especial \u00e0s \u00e1reas ao redor dos acess\u00f3rios de montagem. O sal se acumula nesses locais.<\/li>\n
    • Mantenha a press\u00e3o da \u00e1gua abaixo de 80 bar. A lavagem com alta press\u00e3o danifica a camada externa do material.<\/li>\n
    • Deixe o para-lama de molho por 3 a 5 minutos. Isso amolece os cristais de sal antes de esfregar.<\/li>\n<\/ul>\n

      Passo 03: Limpe a superf\u00edcie externa<\/h3>\n
        \n
      • Dilua o detergente neutro conforme as instru\u00e7\u00f5es do r\u00f3tulo (normalmente 1 parte de detergente para 20 partes de \u00e1gua).<\/li>\n
      • Esfregue com a escova macia usando movimentos circulares.<\/li>\n
      • Trabalhe em pequenas se\u00e7\u00f5es de cerca de 0,5 metros quadrados. Isso evita que o sab\u00e3o seque antes de voc\u00ea enxaguar.<\/li>\n
      • Enx\u00e1gue de cima para baixo com \u00e1gua limpa. Certifique-se de que n\u00e3o restem res\u00edduos de sab\u00e3o.<\/li>\n<\/ul>\n

        Passo 04: Secar e proteger<\/h3>\n
          \n
        • Remova a \u00e1gua parada com um pano de microfibra.<\/li>\n
        • Leve o para-lama para uma \u00e1rea sombreada e ventilada para secar ao ar livre.<\/li>\n
        • N\u00e3o deixe exposto \u00e0 luz solar direta acima de 40 graus Celsius. O poliuretano envelhece mais rapidamente em altas temperaturas.<\/li>\n
        • Ap\u00f3s secar, aplique uma cera UV de silicone \u00e0 base de \u00e1gua, se dispon\u00edvel. Evite produtos \u00e0 base de \u00f3leo.<\/li>\n<\/ul>\n

          \"Guia<\/p>\n

          Passo 05: Inspecione a pele externa<\/h3>\n
            \n
          • Realize esta inspe\u00e7\u00e3o em um local com boa ilumina\u00e7\u00e3o natural.<\/li>\n
          • Trabalhe na superf\u00edcie por se\u00e7\u00f5es. Verifique cada \u00e1rea sistematicamente.<\/li>\n
          • Utilize a tabela de classifica\u00e7\u00e3o de defeitos abaixo para classificar o que voc\u00ea encontrar.<\/li>\n<\/ul>\n

            Tabela de classifica\u00e7\u00e3o de defeitos de pele:<\/strong><\/p>\n\n\n\n\n\n\n\n
            Tipo de defeito<\/strong><\/td>\nMenor (continuar o uso)<\/strong><\/td>\nModerado (plano de reparo)<\/strong><\/td>\nGrave (retirar de servi\u00e7o)<\/strong><\/td>\n<\/tr>\n
            Rachaduras superficiais<\/td>\nProfundidade inferior a 1 mm, comprimento inferior a 50 mm<\/td>\nProfundidade de 1 a 3 mm ou comprimento de 50 a 200 mm<\/td>\nProfundidade superior a 3 mm ou fissura que atinge o n\u00facleo de espuma.<\/td>\n<\/tr>\n
            desgaste superficial<\/td>\nSuperf\u00edcie polida, sem perda de material<\/td>\nEspessura reduzida em menos de 30%<\/td>\nEspessura reduzida em mais de 30%<\/td>\n<\/tr>\n
            Pontos fracos<\/td>\nRetorna \u00e0 posi\u00e7\u00e3o inicial imediatamente ap\u00f3s ser pressionado.<\/td>\nA recupera\u00e7\u00e3o leva mais de 5 segundos.<\/td>\nN\u00e3o se ouve nenhum som de \u00e1gua ou rebote no interior.<\/td>\n<\/tr>\n
            corros\u00e3o de hardware<\/td>\nPel\u00edcula de \u00f3xido superficial, limpa-se normalmente<\/td>\nApresenta corros\u00e3o, mas o hardware ainda funciona.<\/td>\nCorros\u00e3o severa afetando a resist\u00eancia estrutural<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

            Etapa 06: Inspecionar e fazer a manuten\u00e7\u00e3o do hardware<\/h3>\n
              \n
            • Verifique todos os olhais girat\u00f3rios, elos da corrente e parafusos de fixa\u00e7\u00e3o.<\/li>\n
            • Remova a ferrugem superficial com uma escova de arame. Aplique novamente graxa de l\u00edtio de grau mar\u00edtimo.<\/li>\n
            • Verifique o torque dos parafusos de acordo com as especifica\u00e7\u00f5es de instala\u00e7\u00e3o. Parafusos M16 normalmente requerem de 110 a 130 Nm.<\/li>\n
            • Substitua o componente se a corros\u00e3o tiver reduzido a se\u00e7\u00e3o transversal em mais de 20%. Remendar n\u00e3o \u00e9 seguro nesse est\u00e1gio.<\/li>\n<\/ul>\n

              Etapa 07: Atualizar o Registro de Manuten\u00e7\u00e3o<\/h3>\n
                \n
              • Cada para-lama deve ter seu pr\u00f3prio registro. Anote a data da inspe\u00e7\u00e3o, as constata\u00e7\u00f5es, as a\u00e7\u00f5es tomadas e o nome do inspetor.<\/li>\n
              • Tire fotos sempre do mesmo \u00e2ngulo, todos os anos. Isso facilita o acompanhamento do envelhecimento da pele ao longo do tempo.<\/li>\n
              • Quando o para-lama completar 15 anos, providencie um teste de desempenho profissional. Use o resultado para decidir se deve continuar usando-o ou substitu\u00ed-lo.<\/li>\n<\/ul>\n

                \"Manuten\u00e7\u00e3o<\/p>\n

                Cronograma de manuten\u00e7\u00e3o e lista de verifica\u00e7\u00e3o de inspe\u00e7\u00e3o<\/h2>\n

                O cronograma abaixo \u00e9 baseado no Cap\u00edtulo 7 das Diretrizes PIANC 2002 para o Projeto de Sistemas de Defensas. A verifica\u00e7\u00e3o trimestral foi adicionada para ambientes de alta exposi\u00e7\u00e3o, como \u00e1reas costeiras tropicais com altos n\u00edveis de salinidade e radia\u00e7\u00e3o UV.<\/p>\n\n\n\n\n\n\n\n
                Frequ\u00eancia<\/strong><\/td>\nTarefa principal<\/strong><\/td>\nPrincipais itens a verificar<\/strong><\/td>\nTempo por Para-lama<\/strong><\/td>\n<\/tr>\n
                Semanal<\/td>\nPasseio visual<\/td>\nDanos vis\u00edveis, deslocamento, pe\u00e7as soltas<\/td>\n2 a 3 minutos<\/td>\n<\/tr>\n
                Mensal<\/td>\nLimpar e inspecionar<\/td>\nAc\u00famulo de sal, algas, rachaduras, \u00e1reas desgastadas<\/td>\n20 a 30 minutos<\/td>\n<\/tr>\n
                Trimestral<\/td>\nInspe\u00e7\u00e3o detalhada<\/td>\nTeste de entrada de \u00e1gua, torque dos parafusos, atualiza\u00e7\u00e3o de registros<\/td>\n45 a 60 minutos<\/td>\n<\/tr>\n
                Anualmente<\/td>\nAvalia\u00e7\u00e3o completa<\/td>\nAvalia\u00e7\u00e3o de desempenho, compara\u00e7\u00e3o de fotos, avalia\u00e7\u00e3o de vida<\/td>\nAproximadamente 2 horas<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                Lista de verifica\u00e7\u00e3o mensal para inspe\u00e7\u00e3o (para imprimir):<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
                Item de Inspe\u00e7\u00e3o<\/b><\/strong><\/td>\nStatus (OK \/ A\u00e7\u00e3o necess\u00e1ria \/ N\/A)<\/b><\/strong><\/td>\nNotas<\/b><\/strong><\/td>\n<\/tr>\n
                Sem novas rachaduras ou sulcos profundos na superf\u00edcie externa.<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
                Aus\u00eancia de delamina\u00e7\u00e3o ou forma\u00e7\u00e3o de bolhas na pele externa.<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
                Aus\u00eancia de crescimento excessivo de algas ou cracas na superf\u00edcie.<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
                Limpeza conclu\u00edda. Sem res\u00edduos de sab\u00e3o.<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
                Os olhais girat\u00f3rios giram livremente sem emperrar.<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
                Os parafusos de fixa\u00e7\u00e3o est\u00e3o apertados. Nenhum est\u00e1 faltando.<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
                Componentes lubrificados novamente com lubrificante de grau mar\u00edtimo<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
                O formato do para-lama est\u00e1 normal. Nenhuma deforma\u00e7\u00e3o permanente vis\u00edvel.<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
                A superf\u00edcie retorna \u00e0 posi\u00e7\u00e3o original de forma uniforme quando pressionada. N\u00e3o foram detectados pontos macios.<\/td>\n <\/td>\n <\/td>\n<\/tr>\n
                Registro de manuten\u00e7\u00e3o atualizado (data, constata\u00e7\u00f5es, nome do inspetor)<\/td>\n <\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                \"Cronograma<\/p>\n

                Conclus\u00e3o<\/h2>\n

                Defensas preenchidas com espuma s\u00e3o um investimento a longo prazo. Elas protegem tanto as embarca\u00e7\u00f5es quanto as estruturas do cais durante todas as manobras de atraca\u00e7\u00e3o. Com os devidos cuidados, podem ter um desempenho confi\u00e1vel por 20 anos ou mais.<\/p>\n

                A chave \u00e9 a consist\u00eancia. Inspe\u00e7\u00f5es semanais levam apenas alguns minutos. Limpezas e inspe\u00e7\u00f5es mensais evitam que pequenos problemas se transformem em falhas dispendiosas. Avalia\u00e7\u00f5es anuais informam exatamente em que ponto da vida \u00fatil cada para-lama se encontra.<\/p>\n

                Perguntas mais frequentes<\/h2>\n

                O que acontece \u00e0 embarca\u00e7\u00e3o se uma defensa n\u00e3o for devidamente mantida?<\/h3>\n

                Uma camada externa rachada permite que o n\u00facleo de espuma absorva \u00e1gua. A espuma molhada tem menor capacidade de absor\u00e7\u00e3o de energia. De acordo com o modelo energ\u00e9tico da norma ISO 17357, uma redu\u00e7\u00e3o de 15% na densidade da espuma aumenta a for\u00e7a de rea\u00e7\u00e3o m\u00e1xima em aproximadamente 20, para 25%. Isso significa que o para-choque exerce uma for\u00e7a maior contra o casco durante a atraca\u00e7\u00e3o. Com o tempo, isso aumenta o risco de danos ao revestimento do casco e de tens\u00f5es estruturais.<\/p>\n

                Qual a diferen\u00e7a na manuten\u00e7\u00e3o de defensas pneum\u00e1ticas em compara\u00e7\u00e3o com defensas preenchidas com espuma?<\/h3>\n

                Defensas pneum\u00e1ticas (abordadas pela ISO 17357 Parte 1) necessitam de verifica\u00e7\u00f5es regulares de press\u00e3o, normalmente entre 50 e 80 kPa. Defensas preenchidas com espuma (abordadas pela ISO 17357 Parte 2) n\u00e3o necessitam de monitoramento de press\u00e3o. Para defensas preenchidas com espuma, a manuten\u00e7\u00e3o concentra-se na integridade da camada externa e na condi\u00e7\u00e3o dos componentes. Este guia abrange apenas defensas preenchidas com espuma.<\/p>\n

                Qual produto de limpeza \u00e9 mais seguro para a pele externa?<\/h3>\n

                Use um detergente neutro com pH entre 6 e 8. Evite \u00e1lcalis fortes, como o hidr\u00f3xido de s\u00f3dio, que hidrolisa as liga\u00e7\u00f5es uret\u00e2nicas do poliuretano. Evite alvejante (hipoclorito de s\u00f3dio), que oxida as cadeias polim\u00e9ricas. Evite solventes org\u00e2nicos, como a acetona, que fazem o material inchar. Se tiver d\u00favidas sobre um produto, teste-o primeiro em uma pequena \u00e1rea escondida.<\/p>\n

                \u00c9 seguro continuar usando um para-lama com entrada de \u00e1gua detectada?<\/h3>\n

                Uma pequena quantidade de umidade nas bordas (ganho de peso inferior a 5% do peso seco) pode aguardar at\u00e9 a pr\u00f3xima inspe\u00e7\u00e3o programada. Se o ganho de peso exceder 10% ou se houver pontos macios, retire o para-lama de servi\u00e7o. A espuma saturada de \u00e1gua perde sua capacidade de absor\u00e7\u00e3o de energia. Em climas frios, a \u00e1gua congelada dentro da espuma pode causar ruptura interna.<\/p>\n

                Quando \u00e9 melhor substituir um para-lama em vez de repar\u00e1-lo?<\/h3>\n

                Considere a substitui\u00e7\u00e3o quando qualquer uma das seguintes condi\u00e7\u00f5es for atendida, com base nos crit\u00e9rios de substitui\u00e7\u00e3o da Se\u00e7\u00e3o 8.2 da PIANC 2002:<\/p>\n

                  \n
                • O para-lama tem mais de 15 anos e, nos testes, sua absor\u00e7\u00e3o de energia caiu em rela\u00e7\u00e3o ao modelo 20%.<\/li>\n
                • Os danos na superf\u00edcie abrangem mais de 30% da \u00e1rea total, e os custos de reparo excedem 40% de uma unidade nova.<\/li>\n
                • O hardware falha em um teste de recertifica\u00e7\u00e3o estrutural devido \u00e0 corros\u00e3o.<\/li>\n
                • O n\u00facleo de espuma sofreu deforma\u00e7\u00e3o permanente e o desvio da forma da se\u00e7\u00e3o transversal excede 10%.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

                  To keep foam fenders marine in good shape, you need to check them every three months for skin damage, remove […]<\/p>\n","protected":false},"author":1,"featured_media":1475,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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