Payment & Shipping Terms:
|Coverage Area:||All Area In China||Inspection Report:||English Or Per Client Request|
|Price:||All Inclusive||Product:||CORROSION, PAINTING & BLASTING|
|Inspection Arrangement:||On Call||Discount:||Available For Frame Agreement|
CORROSION, PAINTING & BLASTING qc inspection services with experienced inspector on call
1. Failure of paint
The main reasons of paint failure after application on surface are the applicator and improper treatment of surface. For paint qc inspection services application Defects can be attributed to:
This usually occurs when the dilution of the paint is not done as per the manufacturer’s recommendation. There can be a case of over dilution and under dilution, as well as dilution with the incorrect diluents.
Foreign contaminants added without the manufacturer’s consent which results in various film defects.
Most commonly due to improper surface treatment before application and inherent moisture/dampness being present in the substrate
Chalking is the progressive powdering of the paint film on the painted surface. The primary reason for the problem is polymer degradation of the paint matrix due to exposure of UV radiation in sunshine and condensation from dew.
Cracking of paint film is due to the unequal expansion or contraction of paint coats. It usually happens when the coats of the paint are not allowed to cure/dry completely before the next coat is applied. The degree of cracking can be assessed according to International Standard ISO 4628 Part 4 or ASTM Method D661 (Standard Test Method for Evaluating Degree of Cracking of Exterior Paints).
Erosion is very quick chalking. It occurs due to external agents like air, water etc. It can be evaluated using ASTM Method ASTM D662 (Standard Test Method for Evaluating Degree of Erosion of Exterior Paints).
Blistering is due to improper surface exposure of paint to strong sunshine. The degree of blistering can be assessed according to ISO 4628 Part 2 or ASTM Method D714 (Standard Test Method for Evaluating Degree of Blistering of Paints).
Volatile Organic Compounds (VOCs) in paint are considered harmful to the environment and especially for people who work with them on a regular basis. Exposure to VOCs has been related to organic solvent syndrome, although this relation has been somewhat controversial.
2. Common Technical Stadards for paint qc inspection services
|BS En ISO 3861||Rubber hoses for sand and grit blasting – specification|
|ASTM C418||Standard test method for abrasion resistance of concrete by sandblasting|
|ANSI 29.4||Abrasive-blasting operations - ventilation and safe practices for fixed location|
|ASTM D4940||Standard test method for conduct metric analysis of water soluble ionic contamination of blasting abrasives|
|ASTM F1330||Standard guide for metallic abrasive blasting to descale the interior of pipe.|
|BS EN 2497||Specification for dry abrasive blasting of titanium and titanium alloys|
|BS EN ISO 14877||Protective clothing for abrasive blasting operations using granular abrasives|
|BS EN 271 Respiratory devices||compressed air line or powered fresh air hose breathing apparatus incorporating a hood for use in abrasive blasting operations - requirements, testing, marking ** w/d s/s by BS en 14593-1, BS En 14593-2 and BS En 14594 **|
|ASTME1681||Standard test method for determining threshold stress intensity factor for environment-assisted cracking of metallic materials|
|ASTM G36||Standard practice for evaluating stress-corrosion-cracking resistance of metals and alloys in a boiling magnesium chloride solution|
|ISO 17641-1||Destructive tests on welds in metallic materials - hot cracking tests for weldments – arc welding processes - part 1: general|
|ISO DIS 7539.11||Corrosion of metals and alloys - stress corrosion cracking – part 11: guidelines for testing the resistance of metals and alloys to hydrogen embrittlement and hydrogen-assisted cracking|
|NACE TM177||Laboratory testing of metals for resistance to sulphide stress cracking and stress corrosion cracking in h2s environments|
|ANSI/NACE MR0175/ISO 15156||Petroleum and natural gas industries — Materials for use in H2S-containing environments in oil and gas production|
|BS ISO 15324||Corrosion of metals and alloys - evaluation of stress corrosion cracking by the drop evaporation test|
|ASTM D1731||Standard practices for preparation of hot-dip aluminium surfaces for painting|
|ASTM D2200||Standard practice for use of pictorial surface preparation standards and guides for painting steel surfaces|
|ASTM D3276||Standard guide for painting inspectors (metal substrates)|
|ASTM D6237||Standard guide for painting inspectors (concrete and masonry substrates)|
|BS EN ISO 8502-3||Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness- part 3: assessment of dust on steel surface prepared for painting (Pressure-sensitive tape method)|
|SSPC QP-1||Standard procedure for evaluating painting contractors (field application to complex industrial structures)|
|Svensk Standard SIS 05 59 00||Pictorial surface preparation standards for painting steel surfaces.|
|ISO 8501-1 2007||Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness – Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings|
3. Why choose INF qc inspection services
Our local qc inspection services team are close to these manufacturers and most of them have experiences of inspection/audit in these factories, they are familar with their QC system and products. With this advantage, our inspector can catch the critical inspection points quickly without "adaptive phase", this will means cost and time saving for our clients.
paint qc inspection services/ coating qc inspection services/ blasting qc inspection services