Since laboratory data (such as salt spray tests) could not accurately assess the corrosion performance of screws in the real environment, we launched the real natural environment test base. The corrosive elements of the coastal environment, combined with UV exposure and seasonal humidity, were important factors for us to start this experiment. We continue to follow up the collection of real environmental experimental data for the research and development of anti-corrosion coating for screws, compared with similar products, "IFS" series screws have better corrosion resistance.

The main characteristic of the industrial environment is the smoke and pollution caused by sulfides and nitrogen oxides. As industrial production intensifies, these polluting ions float in the air and accumulate, resulting in acid rain. Acid rain, also known as acid precipitation, accelerates natural climate change due to rainfall, sunlight, snow, and wind. The result is that polluting ions in the industrial environment, combined with the action of moisture and smoke, create a wet acidic film with high corrosive force on the surface of the exposed building. Part of the condensed water is also included in the air pollution, attached to the screw located under the roof panel, resulting in flag rust, so that the building loses structural integrity, this phenomenon can also be explained by the electrochemical reaction of the steel plate and screw.

In Marine climates, air containing salt adheres to the surface of the exposed material due to the action of the wind. The degree of pollution of the Marine environment varies according to several factors, such as altitude, distance from the sea, ground line, wind speed and direction. Moisture is a necessary factor in a variety of corrosion processes, and when it is associated with elevated temperatures or contaminated substances, it is also associated with corrosion of exposed metals and fasteners. Marine salt spray is a catalyst for electrochemical reaction corrosion.

Moisture refers to moisture in the air in the form of steam, which combines with other polluting elements and destroys metal surface substances. It contains a very high concentration of corrosive substances. In particular, it forms a corrosive attack on exposed, mismatched metal coatings under bidirectional dry and wet replacement conditions. Moisture is the main cause of corrosion in the part of the screw that is located at the crest of the wave, and ultraviolet radiation pollution from sunlight can destroy the exposed metal surface coating. Similar to the effects on human skin, UV rays are also eating away at poorly coated screws.

Galvanic or electrolytic corrosion occurs between metals with different potentials in the electrolyte, this phenomenon is usually formed by mixing corrosive substances and rain in the environment, and is a very common form of corrosion. The galvanic cell reaction is enhanced in the presence of high temperature, corrosive substances, such as near the sea or industrial waste dust environment. Laboratory tests are usually performed on a neutral fixture, such as plastic that is not in contact with metal, so the results produced are not representative of steel construction, and the coating on the screw should be comparable to the coating of the roofing material or its corrosion resistance.