Coating of bottom of engine room cabin should be in normally environment and ensure the construction below safe condition is mixed dry. Coating rises at least one year from production day inside, the product should servantchoose a person for a job in original vessel labour or mechanical mix are even. Cabin bottom coating should be mixed form a complete set of priming paint of commonly used workshop. Should apply to brush besmear, roll Tu He not to have construction of law of spray of air maximum pressure, inside film ply of the regulation construction should not happen stream hang, when nature of priming coat of engine room cabin ageing or when destroying, should undertake repairing with system of painting of bottom of cabin of former engine room. Cabin bottom coating should have good compatibility with formulary thinner. Before coating besmear is installed, must undertake dividing rust and eliminate thoroughly to rolled steel surface smeary, the requirement that divide rust is the St3 class in GB8923. The technical index of coating of bottom of engine room cabin should accord with the following requirement:
① is fineness (μ M) ≤ 80 (scale coating except) ;
② viscosity, accord with special technology requirement;
③ density (G/mL) , accord with product technology requirement;
④ adds exert oneself (MPa) ≥ 3;
⑤ dry time (H) , the watch does ≤ 8, ≤ of get right on the job 24;
⑥ impact resistance (Cm) , 30;
⑦ is able to bear or endure saline mist sex (500h) , one class;
Sex of ⑧ heat-resisting brine (336h) , film does not have bubbly, chap, flake, wrinkle and rusty spot;
⑨ is able to bear or endure derv sex [(23 ± 2) ] of ℃ , half an year, film does not have bubbly, bate, flake and rusty spot.