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Does color steel plate fade over time?
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In every corner of the city, buildings and facilities made of Color steel plate can be seen everywhere, decorating our lives with bright colors and diverse shapes. However, as time quietly passes, will these once dazzling color steel plates gradually lose their former glory and experience fading? This question is like a mysterious puzzle hidden behind the color steel plate, attracting us to explore it.
1. The influence of coating type on fadingThe weather resistance of color steel plates mainly depends on the chemical stability of the surface coating. Common coatings include polyester (PE), silicon modified polyester (SMP), high weather resistant polyester (HDP), and polyvinylidene fluoride (PVDF), and their fading resistance is related to:
1. Polyester coating: containing organic pigments, it is prone to photochemical reactions under long-term ultraviolet irradiation, resulting in a lighter or yellowed color, usually showing significant fading after 3-5 years;
2. Silicon modified polyester: By modifying with siloxane, the weather resistance is improved, and the fading cycle is extended to 5-8 years;
3. High weather resistant polyester: using inorganic pigments and stabilizers, it has stronger UV resistance, and the fading cycle of color steel plates can reach 8-10 years;
4. Polyvinylidene fluoride (PVDF): Fluorocarbon resin has a stable structure, excellent resistance to chemical corrosion and ultraviolet radiation, and no significant fading under normal maintenance for more than 15 years.
2. Environmental exposure conditions accelerate fading1. UV intensity: At high altitudes, near the equator, or in open areas without obstruction, UV radiation is strong, causing the coating molecular chains of color steel plates to break faster and the fading cycle to be shortened by 30% -50%;
2. Temperature and humidity alternation: When there is a large temperature difference between day and night or in humid environments (such as coastal areas), micro cracks may occur in the coating due to thermal expansion and contraction, causing corrosion and accelerated fading after moisture infiltration;
3. Acid alkali corrosion: Near industrial areas or chemical plants, acidic gases such as sulfur dioxide and nitrogen oxides in the air react with coatings, resulting in darkening or mottled colors.
3. The delaying effect of maintenance methods on fading1. Regular cleaning: Clean the surface with a neutral cleaner every six months to remove dust, bird droppings, and other pollutants, and prevent chemical reactions with the coating;
2. Touch up protection: If there are slight scratches or aging on the coating, it is necessary to promptly apply the same type of coating to avoid local corrosion and diffusion;
3. Sunshade treatment: Install sunshades or reflective film above the roof color steel plate to reduce direct ultraviolet radiation and extend the fading cycle by 20% -40%.
4、 The impact and response after fading
The fading of color steel plates not only affects their appearance, but may also reduce their ability to reflect sunlight, leading to an increase in indoor temperature and an increase in air conditioning energy consumption. If fading is accompanied by coating peeling, immediate overall renovation is required, otherwise the steel plate substrate is prone to rust and shorten its service life after exposure.
The fading of color steel plates may seem like a minor issue, but it actually relates to multiple aspects such as the aesthetics, service life, and safety of the building. Both builders and users should not take the fading problem of color steel plates lightly. Always pay attention to the condition of the color steel plate, promptly identify problems, and take corresponding measures. Only in this way can we ensure that color steel plates can maximize their value in construction and create a safer and more aesthetically pleasing living and working environment for us.
https://www.mysdsteels.com/news/industry-news/show703.html
1. The influence of coating type on fadingThe weather resistance of color steel plates mainly depends on the chemical stability of the surface coating. Common coatings include polyester (PE), silicon modified polyester (SMP), high weather resistant polyester (HDP), and polyvinylidene fluoride (PVDF), and their fading resistance is related to:
1. Polyester coating: containing organic pigments, it is prone to photochemical reactions under long-term ultraviolet irradiation, resulting in a lighter or yellowed color, usually showing significant fading after 3-5 years;
2. Silicon modified polyester: By modifying with siloxane, the weather resistance is improved, and the fading cycle is extended to 5-8 years;
3. High weather resistant polyester: using inorganic pigments and stabilizers, it has stronger UV resistance, and the fading cycle of color steel plates can reach 8-10 years;
4. Polyvinylidene fluoride (PVDF): Fluorocarbon resin has a stable structure, excellent resistance to chemical corrosion and ultraviolet radiation, and no significant fading under normal maintenance for more than 15 years.
2. Environmental exposure conditions accelerate fading1. UV intensity: At high altitudes, near the equator, or in open areas without obstruction, UV radiation is strong, causing the coating molecular chains of color steel plates to break faster and the fading cycle to be shortened by 30% -50%;
2. Temperature and humidity alternation: When there is a large temperature difference between day and night or in humid environments (such as coastal areas), micro cracks may occur in the coating due to thermal expansion and contraction, causing corrosion and accelerated fading after moisture infiltration;
3. Acid alkali corrosion: Near industrial areas or chemical plants, acidic gases such as sulfur dioxide and nitrogen oxides in the air react with coatings, resulting in darkening or mottled colors.
3. The delaying effect of maintenance methods on fading1. Regular cleaning: Clean the surface with a neutral cleaner every six months to remove dust, bird droppings, and other pollutants, and prevent chemical reactions with the coating;
2. Touch up protection: If there are slight scratches or aging on the coating, it is necessary to promptly apply the same type of coating to avoid local corrosion and diffusion;
3. Sunshade treatment: Install sunshades or reflective film above the roof color steel plate to reduce direct ultraviolet radiation and extend the fading cycle by 20% -40%.
4、 The impact and response after fading
The fading of color steel plates not only affects their appearance, but may also reduce their ability to reflect sunlight, leading to an increase in indoor temperature and an increase in air conditioning energy consumption. If fading is accompanied by coating peeling, immediate overall renovation is required, otherwise the steel plate substrate is prone to rust and shorten its service life after exposure.
The fading of color steel plates may seem like a minor issue, but it actually relates to multiple aspects such as the aesthetics, service life, and safety of the building. Both builders and users should not take the fading problem of color steel plates lightly. Always pay attention to the condition of the color steel plate, promptly identify problems, and take corresponding measures. Only in this way can we ensure that color steel plates can maximize their value in construction and create a safer and more aesthetically pleasing living and working environment for us.
https://www.mysdsteels.com/news/industry-news/show703.html
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