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Desengraxantes (português brasileiro) ou D … Desengraxantes (português brasileiro) ou Desengordurantes (português europeu) são compostos químicos e formulações essenciais a muitos processos industriais, como um prelúdio ao ou a componentes de proteção ou revestimento, nos processos genericamente chamados de desengraxe. Galvanoplastia é particularmente sensível a limpeza das peças, dado que as camadas moleculares de óleos, graxas e gorduras (como as das mãos dos operários) podem evitar do revestimento. Substâncias que são usadas para a remoção de gorduras de origem biológica, como óleos vegetais, ceras, ("sebo") são muitas vezes chamadas desengordurantes. A norma ASTM B322 é um guia para a limpeza de metais antes de galvanoplastia. Os processos de desengraxe incluem limpeza com solventes secos, detergentes de limpeza alcalinos a quente, eletrolimpeza e . O teste industrial mais comum para a limpeza é o teste waterbreak (aproximadamente, teste de escorrimento), no qual a superfície é bem enxaguada e colocada na vertical. Contaminantes hidrofóbicos, tais como os óleos fazem com que a água forme gotas e rompa a aderência, permitindo o escoamento rapidamente. Quando perfeitamente limpas as superfícies de metal hidrofílico mantêm uma película contínua de água que não escorre (isenta de gotas - cuja existência revela presença de sujidades). A norma ASTM F22 descreve uma versão deste ensaio. Este teste não detecta contaminantes hidrofílicos, mas o processo de galvanoplastia podem deslocá-los facilmente uma vez que suas soluções são à base de água. Surfactantes como sabões reduzem a sensibilidade do teste, de forma que estes devem ser completamente lavados.que estes devem ser completamente lavados.
, Parts cleaning is essential to many indust … Parts cleaning is essential to many industrial processes, as a prelude to surface finishing or to protect sensitive components. Electroplating is particularly a sensitive to part cleanliness, since molecular layers of oil can prevent the adhesion of the coating. ASTM B322 is a standard guide for cleaning metals prior to electroplating. Cleaning processes include solvent cleaning, hot alkaline detergent cleaning, electro-cleaning, and acid etch. The most common industrial test for cleanliness is the water-break test, in which the surface is thoroughly rinsed and held vertical. A quantitative measurement for this parameter is contact angle. Hydrophobic contaminants such as oils cause the water to bead and break up, allowing the water to drain rapidly. Perfectly clean metal surfaces are hydrophilic and will retain an unbroken sheet of water that does not bead up or drain off. ASTM F22 describes a version of this test. This test does not detect hydrophilic contaminants, but the electroplating process can displace these easily since the solutions are water-based. Surfactants such as soap reduce the sensitivity of the test, so these must be thoroughly rinsed off.t, so these must be thoroughly rinsed off.
, Gewerbliche und industrielle Teilereinigun … Gewerbliche und industrielle Teilereinigung dient zur Entfernung unerwünschter Schichten oder Partikel von den zu reinigenden Teilen, um die Qualität entweder von Folgeprozessen (wie etwa Farbbeschichten, Galvanisieren, Härten), oder die Reinheit der Endprodukte sicherzustellen. Reinheit der Endprodukte sicherzustellen.
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Desengraxantes (português brasileiro) ou D … Desengraxantes (português brasileiro) ou Desengordurantes (português europeu) são compostos químicos e formulações essenciais a muitos processos industriais, como um prelúdio ao ou a componentes de proteção ou revestimento, nos processos genericamente chamados de desengraxe. Galvanoplastia é particularmente sensível a limpeza das peças, dado que as camadas moleculares de óleos, graxas e gorduras (como as das mãos dos operários) podem evitar do revestimento.s operários) podem evitar do revestimento.
, Gewerbliche und industrielle Teilereinigun … Gewerbliche und industrielle Teilereinigung dient zur Entfernung unerwünschter Schichten oder Partikel von den zu reinigenden Teilen, um die Qualität entweder von Folgeprozessen (wie etwa Farbbeschichten, Galvanisieren, Härten), oder die Reinheit der Endprodukte sicherzustellen. Reinheit der Endprodukte sicherzustellen.
, Parts cleaning is essential to many indust … Parts cleaning is essential to many industrial processes, as a prelude to surface finishing or to protect sensitive components. Electroplating is particularly a sensitive to part cleanliness, since molecular layers of oil can prevent the adhesion of the coating. ASTM B322 is a standard guide for cleaning metals prior to electroplating. Cleaning processes include solvent cleaning, hot alkaline detergent cleaning, electro-cleaning, and acid etch. The most common industrial test for cleanliness is the water-break test, in which the surface is thoroughly rinsed and held vertical. A quantitative measurement for this parameter is contact angle. Hydrophobic contaminants such as oils cause the water to bead and break up, allowing the water to drain rapidly. Perfectly clean metal surfaces are hydro. Perfectly clean metal surfaces are hydro
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Teilereinigung
, Parts cleaning
, Desengraxante
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