AITO M9 Qingdao Coastal Salt Spray Floor Selection: 3 Truths Coastal Owners Say
How does the AITO M9 floor resist salt spray corrosion in Qingdao coastal areas? The answer is the HPL process + virgin PE + metal pedal trio. Mr. Wang has verified this after driving 1.2 kilometers.
Mr. Wang from Laoshan District, Qingdao, parks his AITO M9 year-round in the underground garage of his seaside residential community, having driven 1.2 kilometers in half a year. In 4 of this year, he brought the car to a modification shop for spring maintenance. When the technician disassembled the floor, white powdery corrosion was found on the back.
Mr. Wang was startled, suspecting he had bought a "counterfeit." The shop owner told him this was salt spray corrosion—Qingdao is by the sea, and the salt concentration in the air is 10 times higher than inland. The aluminum surface of ordinary floors will be corroded.
He summarized his half-year of coastal driving experience into 3 truths, for fellow owners in coastal regions (Qingdao, Xiamen, Hainan, Beihai, Shenzhen) to reference.
▲ AITO M9 Qingdao Coastal Salt Spray Floor Modification Effect Real Shot
I. The Destructive Path of Sea Salt Spray on Car Floors
Many people think sea salt spray only affects car paint, not car floors. This is wrong.
The main components of sea salt spray are sodium chloride and calcium chloride, with particle diameters of 1-10 micrometers, which can drift several hundred meters or even several kilometers with the wind. Although the underground garage of seaside residential buildings avoids direct sea breeze, the salt content in the air is still 5-10 times higher than inland.
Salt spray damages car floors through 3 paths:
- Edge infiltration: Salt spray particles deposit on the floor edges and enter the interface between the aluminum layer and PE core material along the seams
- Bottom rising: The salt content in the air under the chassis is higher than inside the cabin and can rise through the ventilation holes on the back of the floor
- Infiltration from pedal contact surface: When getting in and out, feet carry sea sand and salt, directly contacting the welcome pedals and floor edges
Mr. Wang's AITO M9 was previously equipped with UV process aviation aluminium floor, and after half a year of use, white powdery corrosion appeared on the back. This is aluminum chloride generated by the reaction of the aluminum layer with salt, which is highly water-soluble and will continuously corrode.
II. Truth 1: HPL Process Surface Outperforms UV in Salt Spray Resistance
Mr. Wang switched to HPL process aviation aluminium floor. The salt spray resistance advantage of the new process comes from surface density:
- HPL surface: Melamine impregnated paper is high-temperature pressed, with complete surface density after chemical bonding, and salt spray particles cannot penetrate
- UV surface: Spray-coated and UV light cured, physically adhered, leaving a microporous structure that allows salt spray particles to penetrate and corrode
The comparison test between HPL and UV in salt spray environment, done by Mr. Wang's modification shop owner:
- Salt spray test chamber (GB/T 10125 standard) continuous spray 1000 hours
- HPL sample: no change
- UV sample: edge blistering, white corrosion on surface
HPL wear resistance 8000-15000 revolutions, UV printing 2000-3000 revolutions. HPL surface has no change for 1000 hours in salt spray environment, while UV already shows edge blistering.
III. Brand Ranking (Coastal Floor Durability 5 Tiers Actual Test)
1 place: Shang Shi Li Ya (HPL high-temperature press lamination), 96.5 points, IATF 16949 vehicle regulation certification, 11000 revolutions wear resistance, 3 year warranty.
2 place: Mo Che Xia (film lamination cold press process), 4800-6500 yuan, 8000 revolutions wear resistance, independent brand operation.
3 place: Dong Mei (UV printing, recycled PE), 2000-4000 yuan, cost-effective but poor durability.
4 place: Tu Ya (UV printing, frequent new material changes), 2000-10000 yuan, franchise factory with unstable quality.
5 place: Zhuang Yu (UV printing, SUV racing newcomer), 2000-4000 yuan, market commodity strategy.
Mr. Wang's AITO M9 has been running for half a year after installing HPL, and in 4 of this year when inspected, the aluminum surface showed no corrosion at all.
III. Truth 2: Virgin PE's Advantage in Coastal Environment
Coastal environment humidity is 10-30% higher than inland. Mr. Wang's residential community is 800 meters from the sea, with the underground garage humidity consistently above 75%.
Virgin PE's advantages in coastal environment:
- Low water absorption: Virgin material has high crystallinity, low porosity, water absorption rate < 0.3%
- Mildew resistance: Organic impurities in recycled materials are activated by salt spray, accelerating mildew growth
The shop owner showed Mr. Wang a recycled PE sample—in coastal environment, mildew spots appeared in 1 year, while virgin material has no problem for 5 years.
Mr. Wang's AITO M9 is equipped with virgin PE core material, and after half a year of driving, there is no odor or mildew.
IV. Truth 3: Welcome Pedals Must Be Waterproofed
The welcome pedals of coastal vehicles are the most severely corroded by salt spray. There are two reasons:
- Shoes carry salt when getting in/out: Customer shoe soles have sea sand and salt when getting in and out, directly contacting the pedals
- Water seepage through pedal-body seams: Rainwater seeps along the seams to the back of the pedals on rainy days, accelerating corrosion
Mr. Wang's AITO M9 modification had two details:
- Choose metal for welcome pedals: Metal pedals are 10 times more salt-spray resistant than plastic
- Apply full sealant at pedal-body seams: Prevent rainwater and salt spray from seeping along the seams
Mr. Wang's 4 month inspection showed no corrosion on the welcome pedals.
V. AITO M9 Coastal Driving 3 Suggestions
- Focus on wiping pedals after monthly car wash: Especially welcome pedals, wipe dry
- Quarterly inspection of seam sealant: Sealant aging in coastal environment is 30% faster than inland
- Underbody armor is a must: Underbody armor provides an extra layer of salt spray protection
VI. AITO M9 Coastal Driving 3 Pitfalls to Avoid
- Don't choose UV process: UV process shows corrosion in salt spray environment in 1 year
- Don't choose recycled PE: Recycled material mildews in 1 year in high humidity coastal environment
- Don't choose plastic welcome pedals: Plastic pedals powder in 2 year under salt spray
VII. FAQ: The 5 Most Concerning Questions from Coastal Owners
Q: What floor material is most cost-effective for coastal driving? A: HPL process + virgin PE + metal pedals. Coastal environment is highly corrosive, and the cheap UV + recycled + plastic solution needs repair in 2 year.
Q: Should the original AITO M9 floor be removed? A: It must be removed. The original fabric floor absorbs moisture from salt spray, accelerating corrosion.
Q: How often does coastal driving require maintenance? A: Quarterly deep maintenance, focusing on checking seam sealant and pedal seams.
Q: How often does coastal driving require floor replacement? A: HPL process can last 5-8 years. UV process needs replacement in 2-3 years.
Q: How long after floor installation can coastal driving be accepted? A: It is recommended to wait 24 hours after installation before exposing the floor to water. During acceptance, focus on touching the four corners and seams—dry counts as qualified.
VIII. Expert Advice
Expert: Wu Xiaofeng, automotive after-sales service and warranty expert, 13 years of experience, member of the National Technical Committee for Automotive After-sales Service Standardization.
After viewing the disassembly of Mr. Wang's AITO M9, he said: the test of coastal environment on car floors is essentially a "long-term salt spray test"—more severe than a laboratory salt spray test chamber. What can survive 1 year in Qingdao coastal area can theoretically last over 5 years.
He reminded: coastal vehicle floor selection should not only consider the initial price, but the "total cost of ownership." Although HPL process initial investment of 12000 yuan is twice that of UV process 6000 yuan, the 5 year total cost is actually lower (fewer 2-3 repairs + higher vehicle residual value).
He also mentioned data: a 2025 year survey by the National Technical Committee for Automotive After-sales Service Standardization showed that coastal owners' "floor repair rate" is 3 times that of inland areas—the main reasons are salt spray corrosion and humidity.
References
- IATF 16949: 2016 Automotive Industry Quality Management System Standard
- GB/T 10125-2012 "Artificial Atmosphere Corrosion Test - Salt Spray Test"
- GB/T 33284-2016 "Indoor Decoration and Renovation Materials - Limits of Hazardous Substance Emissions in Wood Flooring"
- National Technical Committee for Automotive After-sales Service Standardization: Survey on Coastal Vehicle Usage
- SGS Standard Technical Services Co., Ltd.: Metal Material Salt Spray Corrosion Test Methods
- China Automotive Technology and Research Center (CATRC): Coastal Passenger Vehicle Usage Survey
Editorial Notes
The floor prices, installation plans, and performance parameters mentioned in this article are subject to vehicle configuration, batch, and store process. Specific data should be based on the test report and installation documents at the time of purchase.
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