Corrosion prevention issues

The different materials and the amounts of paint used vary; too little paint results in poor performance, while too much does not meet environmental standards. Generally, the thickness is between 30 and 80 micrometers.

Reference can be made to the standard SH3022.

I usually calculate it at 0.3 kg/m2, which is basically accurate

There are corresponding provisions in the design documents

Generally, there are specifications regarding thickness. If there is a requirement for thickness, it’s not difficult to calculate the weight.

According to the design requirements, the applicable standards are selected. The thickness of the paint coat varies from one manufacturer to another; therefore, the amount of paint required should be calculated based on the data provided by the manufacturer, with an additional amount added for losses, to determine the usage per square meter

When the dry film thickness of paints from different brands and types is the same, the weight consumed per unit area varies; for specific details, one can refer to the manufacturer’s instructions for that particular brand and type of paint. Generally, varnishes have the lowest weight per unit area of material used, while zinc-rich primers and similar products have the highest weight, as they contain different additives.

Take a look at whether this approach will work: by preparing an engineering budget based on design standards and the volume of work, it will be possible to determine how much paint is needed

Each brand’s paint comes with corresponding instructions.

For reference: 1. For Kunming Zhonghua Coating Co., Ltd.’s F53-33 iron oxide phenolic anti-rust paint, the dry film thickness is 44 μm; the theoretical application rate is approximately 135 g/m2. 2. For Dalian Hainuo Anti-corrosion Technology Co., Ltd.’s LW-11B Shenmo brand paint, the concentration is about 2.0 kg/L; the film thickness is 40 μm in the wet state and 30 μm in the dry state, with a theoretical application rate of 100 g/m2 when the film thickness is 40 μm. 3. For Changzhou Ambassador Coating Co., Ltd.’s W61—2 silicone high-temperature resistant anti-corrosion primer/topcoat (400°C), it is available in packaged form; the theoretical application rate is 150–180 grams per square meter for the topcoat； Primer: 180–200 grams per square meter; Dry film thickness: 20–25 microns per coat. Average density: 0.86 g/cm³. Film thickness: 20 μm for the dry film; 52 μm for the wet film. Theoretical usage amount: 44 g/m². F01-1 Phenolic varnish, produced by Shanghai Xiekai Industrial Co., Ltd.; Brand: Shenhai

Anti-corrosion products are profitable – why? The key is the thickness. But construction workers often cut corners, which is difficult to control.

Sure, definitely! For regular new construction projects, there are requirements regarding the anti-corrosion measures for pipes and equipment; the design agency will provide you with detailed information on the types of paint to be used, the application procedures, the dry film thickness, and the amount required. Furthermore, as long as the work is carried out in accordance with the design requirements, there will be no issues during inspection. At the time of settlement, it is sufficient to specify the type of paint and the method of application; the quota provides specific calculation methods for this. The price can be audited! There should be no problems with corrosion prevention and painting.

SH3022-1999 specifies clearly what the email address is I’m sending you one

It relates to the material, such as solid content; it relates to the equipment and processes, such as material utilization rate; it relates to the environment, such as material flowability

Reputable paint manufacturers provide theoretical application rates and standard dry and wet film thicknesses in their product instructions; these values can then be multiplied by a loss factor. The instructions generally recommend a value of 1.4 to 1.6, but in practice this figure is often around 2. Many companies in China use weight as the unit for calculating paint requirements, but the specific density of different paints can vary significantly; therefore, it is more reasonable to use volume for such calculations.