Met-L-Chek Cleaners, Removers, Developer, Emulsifiables

 

Cleaners/ Removers                 -View Other Met-L-Chek Products-

met_l_chek_logo#300LF is an aqueous alkaline cleaner used for pre-cleaning in preparation for
penetrant inspection. #300LF is approved for use on aerospace components for general degreasing and cleaningand is similarly used in non aerospace applications. In all aqueous cleaner applications the cleaner and residues must be thoroughly rinsed from the surface with clean water and the surface dried prior to penetrant application. #300LF is also used for post inspection cleaning for the removal of inspection penetrant and developer residues

 

met_l_chek_logoE-59 is a class 2 (non-halogenated), Method C inspection penetrant remover. It is designed for use in the solvent wipe technique for penetrant inspection in general metalworking, welding, nuclear and automotive applications. It is a slow dry rate material and is ideal for penetrant wipe removal. E-59 is not used as a pre-inspection surface cleaner. As a penetrant remover it is sprayed onto wiping media and then the penetrant wiped from the surface. The remover should not be sprayed directly on to the test surface to remove the excess penetrant as the sensitivity will be impaired.

 

met_l_chek_logoE-59A is a class 2 (non-halogenated), Method C inspection penetrant remover. It is designed for use in the solvent wipe technique for penetrant inspection in general metalworking, welding, nuclear and automotiveapplications. It is a moderate dry rate material and is ideal for penetrant wipe removal and pre-inspectionsurface cleaning. As a pre-cleaner it is sprayed directly on the test surface. As a penetrant remover it is sprayed onto wiping media and then the penetrant wiped from the surface.The remover should not be sprayed directly on to the test surface to remove the excess penetrant as the sensitivity will be impaired.

 

met_l_chek_logoR-502 is a special application high temperature inspection penetrant remover used as a Method C
remover. It is used with high temperature visible penetrant VP-302. The use range is 51.6 ˚C – 176.6
˚C (125˚F -350˚F). R-502 is applied to a cloth and used to wipe remove the penetrant from the inspection surface. On smooth surfaces the penetrant may wipe off readily, but on rougher surfaces the use of the remover helps to reduce the background color. This makes the actual flaw indications easier to see.

 

met_l_chek_logoR-503 is a class 2 (non-halogenated), Method C inspection penetrant remover. It is designed for use in the solvent wipe technique for penetrant inspection in general metalworking, welding, nuclear and aerospace applications. It is a moderate dry rate material and is ideal for penetrant wipe removal and pre-inspection surface cleaning. As a pre-cleaner it is sprayed directly on the test surface. As a penetrant remover it is sprayed onto wiping media and then the penetrant wiped from the surface. The remover should not be sprayed directly on to the test surface to remove the excess penetrant as the sensitivity will be impaired.

 

 

met_l_chek_logoR-504 is a class 2 (non-halogenated), Method C inspection penetrant remover. It is designed for use in the solvent wipe technique for penetrant inspection in general metalworking, welding, nuclear and aerospace applications. It is a flash dry rate material and as such is ideal for penetrant wipe removal, especially for the verification of indications. A cotton swab is moistened with R-504 and suspected indications are lightly wiped from the surface. The inspector can evaluate the indication by the rate of penetrant bleed back. The rapid drying of R-504 is ideal for this application as it does not blur the indication. The aerosol comes with a spray tube that facilitates pin point application which is ideal for cleaning the star indications on TAM panels. As a pre-cleaner it is sprayed directly on the test surface. As a penetrant remover it is sprayed onto wiping media and then the penetrant wiped from the surface. The remover should not be sprayed directly on to the test surface to remove the excess penetrant as the sensitivity will be impaired.

Developers

met_l_chek_logoD-70 Developer – The use of a developer is required by most penetrant inspection testing specifications. The developer draws the penetrant from the flaw and creates a uniform surface on which to view the penetrant indication. D-70 is used with fluorescent penetrants as form “d” and with visible penetrants as form “e”. It is applied after the surface penetrant has been removed and the inspection surface dried. D-70 nonaqeous developer consists of absorbent powder suspended in a volatile solvent. The developer particles will settle out upon standing, requiring agitation prior to application. This type of developer is most commonly used in aerosol cans, but may also be bulk sprayed using a paint sprayer. The solvent action of this type of developer helps bring the penetrant to the surface enhancing the detectability of the finest flaws. This type of developer uses flammable solvents and should not be used in confined spaces or near open flames or sparks

 

met_l_chek_logoD-72A Developer is used with fluorescent penetrants as form “a”. It is applied after the surface penetrant has been removed and the inspection surface dried. D-72A dry powder developer consists of light fluffy absorbent powder. The particles are very light and will float in the air and are considered a nuisance dust This form of developer is generally applied in special storm or dust chamber equipment, but may also be dusted on to parts with a feather duster, or electrostatic spray. If sprayed avoid build up of a heavy developer film. A very fine dusting is the recommended coverage. The developer film is easily removed from the part surface with water after inspection.

 

met_l_chek_logoD-76B Developer – The use of a developer is required by most penetrant inspection testing specifications. The developer draws the penetrant from the flaw and creates a uniform surface on which to view the penetrant indication. D-76B is used with fluorescent post-emulsifiable penetrants (Type 1, Methods B & D) as a form “b” developer. This form of developer is generally applied by immersion dip, flow on, or gentle airless spray, prior to the drying process. A uniform film will form during the drying.

 

met_l_chek_logoD-78B Developer – The use of a developer is required by most penetrant inspection testing specifications. The developer draws the penetrant from the flaw and creates a uniform surface on which to view the penetrant indication. D-78B is used with fluorescent penetrants (Type 1) and visible penetrants (Type 2)as a form “c” developer. This form of developer is generally applied by immersion dip, flow on, or gentle airless spray, prior to the drying process. A uniform film will form during the drying.

 

met_l_chek_logoD-702 Developer– D-702 is a special application high temprature inspection developer, form “f”, used with high temperature visible penetrant VP-302 to enhance detection of surface cracks and porosity on hot surfaces. The use range is 51.6 ˚C – 176.6 ˚C (125˚F -350˚F). D-702 is applied after the surface penetrant has been removed. D-702 is applied by spraying, either from a portable compressed gas spray pack or by conventional spray gun. The developer consists of absorbent powder suspended in a volatile solvent blend. The developer particles will settle out upon standing, requiring agitation prior to application. It dries quickly and produces a thin white film, which is easily removed with water after inspection. This type of developer contains flammable solvents and should not be used in confined spaces or near open flames or sparks. The use on hot surfaces does not pose a significant fire hazard in the

Emulsifiable

met_l_chek_logoE-50 is a Method B (lipophilic) inspection penetrant emulsifier used with VP-31A red visible (Type 2) penetrant. It is designed to be sprayed onto the post emulsifiable penetrant to render the penetrant water washable. It is a fast acting emulsifier so very short contact time with the penetrant is required. Some users apply the emulsifier by brush and flow on techniques but these methods are not as efficient as spray. E-50 emulsifier is ideal for use on rough castings and other metal surfaces which tend to retain penetrant readily, which causes high background and difficulty in evaluating indications.

 

met_l_chek_logoE-57 is a Method B (lipophilic) inspection penetrant emulsifier approved to AMS-2644 for use with FP- 94, FP-93A(M), FP-95A(M), and FP-97A(M) fluorescent (Type 1) post emulsifiable penetrants. Method B emulsifiers are used either by immersion or flow on. The emulsifier is used as supplied. The penetrant covered part is immersed into the emulsifier and then removed and allowed to drain from 30 seconds to 3 minutes depending upon the part surface roughness. The emulsifier will render the PE penetrant water washable during the dwell time. This step is then followed by a wash step in the Method B process.

 

met_l_chek_logoE-58D is a Method D (hydrophilic) inspection penetrant emulsifier approved to AMS-2644 for use with FP-94,FP- 93A(M),FP-95A(M), andFP-97A(M) fluorescent (Type 1) post emulsifiable penetrants. Method D emulsifiers are used either by immersion or spray on. The emulsifier is diluted with water to the desired working concentration. For immersion the use range is 17 – 20 % or 1 part emulsifier to 4 parts water. The concentration is controlled by using a brix refractometer and a concentration chart. For spray applications the concentration is kept below 5 %. In immersion applications the penetrant covered part is given a quick water wash and then immersed into the gently agitated emulsifier from 30 seconds to 2 minutes depending upon the part surface roughness. The part is removed and washed. The pre-rinse step may be omitted for the spray application method of the emulsifier.

 

 

 

 

 

 

 

 

 

 

 

 

 

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