Inspection Stages
01
Incoming InspectionQuantity, appearance and material of incoming parts are checked.
02
In-Process InspectionElectrolyte condition and process conditions are recorded for every lot and checked against control limits.
03
Final InspectionCoating thickness, appearance and sealing are inspected.
Quality Control Activities
Bath AnalysisConcentrations in the degreasing, neutralizing, anodizing and sealing tanks are analyzed regularly and replenished within control limits. Analysis records are kept and linked to each lot.
Gage R&RMeasurement System Analysis (MSA)Gage R&R verifies the repeatability and reproducibility of variable data such as coating thickness and hardness. Appraiser agreement (Kappa) verifies the consistency of attribute judgments such as appearance.
SPCStatistical Process Control (SPC)Special characteristics such as coating thickness and surface roughness are tracked on X̄-R control charts, and process capability (Cpk) is evaluated periodically.
CalibrationInstrument CalibrationAll measuring instruments are calibrated externally at defined intervals and checked daily against reference standards before use.
Measuring Instruments
All measuring instruments are calibrated externally at defined intervals.
No. | Instrument | Manufacturer · Model | Purpose | Measuring range | Photo |
|---|---|---|---|---|---|
| 01 | pH meter | HANNA · pH0~14/temp. 0~100℃ | Sealing bath pH | ||
| 02 | Vickers hardness tester | MITUTOYO · 10g~1kg | Coating hardness | ||
| 03 | Coating thickness gauge Elcometer 456 | ELCOMETER · 0~500um | Coating thickness | ||
| 04 | Coating thickness gauge QNix 8500 | AUTOMATION · 0~500um(0~20mil) | Coating thickness | ||
| 05 | Coating thickness gauge Elcometer 456 | ELCOMETER · 0~1500um | Coating thickness | ||
| 06 | Coating thickness gauge ISOSCOPE DMP30 | Helmut Fischer · DMP 30 | Coating thickness | 0~1200µm | |
| 07 | Outside micrometer | MITUTOYO · (0~25,0.001)mm | Dimensions | ||
| 08 | Temperature indicator controller | Autonics · -10~900℃ | Temperature calibration | ||
| 09 | Infrared thermometer | Taekwang Electronics · -60~550℃ | Non-contact temperature | ||
| 10 | Temperature indicator controller | Autonics/Hanyoung · -10~900℃ | Temperature calibration | ||
| 11 | Electronic balance | MITUTOYO · 0~120g | Weight | ||
| 12 | Electronic balance | CAS · MAX200kg/Min1kg | Weight | ||
| 13 | Electronic balance | ACOM · 320(0.001)g | Precision weight | ||
| 14 | Conductivity meter | HM · COM-100 | Rinse water conductivity | ||
| 15 | Lux meter | MAX 100,000Lux | Illuminance | ||
| 16 | Surface roughness tester | HOMMEL ETAMIC · 120mm | Surface roughness | ||
| 17 | Digital caliper | MITUTOYO · 150mm | Dimensions | ||
| 18 | Salt spray tester (temperature controller) | Hanyoung · KX2N | Corrosion resistance test | ||
| 19 | Salt spray tester (temperature controller) | NOVA · ST580 | Corrosion resistance test | ||
| 20 | Thread ring gauge | JPG/OJYAS · M27P1.5 | Thread inspection | ||
| 21 | Wear-check thread plug gauge | OSG · LCG-M27X1.5-GW2 | – | ||
| 22 | Thickness reference standard | ELCOMETER · 23.8um/25.1um | Thickness calibration | ||
| 23 | Surface roughness specimen | MITUTOYO · 178-601 | Roughness calibration |