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Anaerobic adhesive because of its unique curing characteristics, has become an indispensable auxiliary products in the machinery industry, mainly play a role in locking and anti-loose, sealing leak prevention, holding positioning, filling leakage, etc. ,
curing bonding strength is the standard to judge the effect, if anaerobic glue after curing the phenomenon of weak bonding strength will be what are the reasons? Listen to Xiaonai for you one-by-one analysis.
anaerobic adhesive applications , anaerobic adhesive bonding strength , anaerobic adhesive bonding strength is weak reasons. Schneider
01, substrate surface problems
substrate surface: to maintain the surface free of oil, grease, dust, pollutants, etc., to ensure the drying of the glue site, is conducive to preventing bonding problems.
, for example, some users to prevent the rust of stock threaded parts and coated with rust-proof oil or other oils, it appears that the material is more bright, but the use of anaerobic glue when there is poor
.
So, the substrate can use anaerobic adhesive before using organic solvents to clean and dry, so that oil-free surface can obtain a higher bonding strength, but can not use oil, kerosene cleaning, chlorine solvent is the most commonly used.
anaerobic adhesive applications , anaerobic adhesive bonding strength , anaerobic adhesive bonding strength is weak reasons. Schneider
02, bonding gap is too large
We all know that the condition of anaerobic adhesive curing is the need to isolate oxygen, will enter the normal curing state, the larger the bonding gap, the more oxygen content of space, the slower the overall curing speed.
if the bonding space is too large, anaerobic adhesive may appear surface curing weak or even not cured within the required time, so minimize the construction gap, the gap with metal gaskets or other methods to minimize the application gap.
anaerobic adhesive applications , anaerobic adhesive bonding strength , anaerobic adhesive bonding strength is weak reasons. Schneider
03, complete curing time is not enough
factors affecting the total curing time of anaerobic glue generally have, the ambient temperature is much lower than usual, with the metal surface is not fully contact, bonding area is not completely isolated air, the surface of the glue substrate can be low belong to inert materials, etc. , will affect the complete curing of anaerobic glue;
if the above phenomenon is carried out glue, and then the test time is not extended, the result may be insufficient bonding strength problem.
anaerobic adhesive applications , anaerobic adhesive bonding strength , anaerobic adhesive bonding strength is weak reasons. Schneider
04, the choice of glue is unreasonable
anaerobic glue is not recommended for use on non-metallic surfaces, if the bonded product is plastic, then anaerobic glue will cause stress cracks on some plastics, causing damage, thus affecting bonding applications.
if the bonded product is non-metallic material, it is recommended to do a good job of comprehensive test verification, at this time will cause because the selection is wrong, misjudgment is glue problem.
anaerobic adhesive applications , anaerobic adhesive bonding strength , anaerobic adhesive bonding strength is weak reasons. "In short,
anaerobic adhesives are suitable for bonding between metals and for bonding of porous or loose materials such as plastics, wood, paper, etc., " Schneider said.
for steel, copper and its alloys and other active metals surface bonding curing fast, high strength, for stainless steel, zinc, cadmium and other inert metal surface curing slow, low strength.
.