1、 Curing mechanism of anaerobic adhesive
1. Isolate oxygen; 2. Reacting with metal ions; Both are indispensable.
Therefore, large gaps (unable to isolate oxygen) and inert metals (such as gold, silver, chromium, nickel, etc. that do not contain active metal ions) must be treated with anaerobic adhesive accelerators in order to cure.
2、 Analysis of the reasons why anaerobic adhesive does not solidify
1.  Low ambient temperature: The curing speed of anaerobic adhesive is affected by the ambient temperature. If the temperature is too low, it will affect its curing speed.
2.  Incomplete surface cleaning: If the surface to be bonded has oil stains, moisture, rust, or oxide layers (such as orchid treatment), these substances may hinder the contact between metal ions and anaerobic adhesive, thereby affecting its curing.
3.  Excessive gap, inert metal: cannot completely isolate oxygen, no metal ions participate in the reaction, anaerobic adhesive will not solidify.
4.  Expired anaerobic adhesive used: Expired anaerobic adhesive may cause incomplete curing of the adhesive.
3、 Solution
1.  Control the ambient temperature: Ensure that the ambient temperature is within the appropriate curing range of the anaerobic adhesive.
2.  Clean the surface to be bonded: Use a cleaning agent and a frosted cloth to clean and scrub the bonding surface to eliminate grease and stains, and ensure that the surface is dry.
3.  Excessive gap and inert metal: Spray anaerobic adhesive promoter on the adhesive surface.
4.  Check the expiration date of anaerobic adhesive: Ensure that the anaerobic adhesive used is within its expiration date.
4、 Customer on-site solution
Customer feedback, purchasing Jia Gu® Anaerobic adhesive, which did not solidify after one week of application, requires technical personnel to provide on-site service. Our technical personnel conducted on-site inspections and experiments as follows:
1. Use Jia Gu® Anaerobic adhesive is used to fix M10 ordinary carbon steel bolts and nuts. After 20 minutes of positioning and curing, there is no problem with the adhesive.
2. Check the material of the uncured bolts and nuts. The bolts are treated with flange and the nuts are silver plated, all of which are inert metal workpieces, as shown in the following figure. The reason for non solidification is that it does not contain active metal ions.
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3. Spray HY764 anaerobic adhesive promoter on the flange bolts and silver plated nuts, and then apply formaldehyde® Anaerobic adhesive, assembly. The positioning time is 15 minutes, and it will solidify well after 1 day. As shown in the following figure:& nbsp;
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4. It is recommended that customers add a process of spraying HY764 anaerobic adhesive promoter before applying anaerobic adhesive.