Product index of 476 anti-mildew agent for coatings

2021-10-13   Pageview:415

Appearance: amber clarified liquid
PH value: 4.5-5.5 (25℃)
Solubility: soluble in aromatic solvents and ethanol solvents
Specific gravity: 1.03-1.06 (25°C)
Boiling point: 160°C
Decomposition point: 220°C














The harbour floating raft board test is a method to qualitatively evaluate the effective performance of the antifouling agent in the paint film based on the natural conditions in the harbour. Choose representative areas for harbour hanging boards, which are generally harbors with large fouling organisms, long breeding seasons, and frequent ships. The sample plate size is 30cm×35cm, 1.5~2mm thick steel plate, painted with a certain thickness of anti-rust and antifouling paint in accordance with the regulations, installed in the frame, released in the floating raft in the sea immersion test (the release test generally selects fouling organisms to breed Before the season), regularly check the fouling of the model. The fouled area is generally expressed as a percentage.

Take photos and record the species of the fouling organisms. If the antifouling agent in the paint film is lower than the effective exudation rate, it will lead to failure. The general customary assessment is: licocene pp wax the stained area is greater than 10%, it is considered that the paint has failed. The harbour floating raft test is a static test, and the current conditions are not as ideal as those on the ship. Usually, the loss of antifouling agent is lower than that on the ship, and the validity period is longer than that on the ship. Therefore, dynamic simulation tests are now used to make up for the shortcomings of static hanging boards.

Dynamic simulation test
This method is closer to real ship dynamics. There are two methods for dynamic test: The first is to make the sample plate into a ship shape, apply the anti-rust and anti-fouling paint on it as required, and then place it in sea water to rotate. The center distance of the rotating shaft is 2m and the speed is 50r/min, which is equivalent to 10nmile/h. The ship rotates for a certain period of time per month, usually 24h, and then is removed and moved to a static floating raft to soak. It is carried out periodically every month, and the fouling situation is regularly checked and recorded. The results obtained by this method are basically the same The real ship is similar.


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