Pre-coated steel-a salt spray testing neih chhan chu simulated marine atmospheric environment-a a coating leh substrate-te corrosion resistance leh protective capabilities tehna a ni.
Tum pawimawh tak takte chu:
Simulated Corrosion Environment: Salt spray testing hian accelerated, high-humidity, high-salt environment a siam a, chu chuan tuipui kam emaw industrial environment-a tawn theih tur corrosive condition te a simulate a ni.
Accelerated Aging Testing: Hun rei lote chhunga (eg, ni emaw kar emaw) chhunga natural condition hnuaia lo lang tur hian thla tam tak emaw kum tam tak emaw a la ngai thei corrosion phenomena enfiah hian hun leh senso a humhim a ni.
Performance Comparison leh Quality Control:** Coating system hrang hrang, supplier, emaw production batch hrang hranga corrosion resistance tehkhin hian material tling ber thlan a pui a, product quality chu standard requirement a tlin theih nan a pui bawk.
Failure Mode Analysis:** Corrosion awmna hmun (eg, scratches, edges, surface) leh form (eg, blistering, peeling, rusting) enfiah hian coating failure chhan te thlirletna leh process emaw formulations emaw tihchangtlun nan a pui thin.
Product Standard Compliance Verification:** Product hian industry standard bik emaw customer- mamawh corrosion resistance life indicator emaw a tlin leh tlin loh enfiah.
Pre-coated steel-a salt spray test-na hian international emaw national standard emaw kaihhnawih (ASTM B117, GB/T 10125, emaw ISO 9227, etc. ang chi) a kawk ber a, neutral salt spray test (NSS) method hman tlanglawn ber hmangin. Step leh mamawh bikte chu hetiang hi a ni:
1. Test buatsaih dan
Specimen buatsaih dan: Pre-coated steel sheet atang hian a dimension tarlan specimen te chu cut rawh. Standard-a a danglamna a awm loh chuan, specimen chunglam chu scrub a ngai tlangpui (scrub chu coating chhungah substrate thlengin a lut tur a ni) a, chu chuan coating-in a chhe tawhna hmuna corrosion propagation a do theih dan tehna a ni.
Specimen Cleaning: Test hmain specimen chunglam chu standard-in a sawi angin uluk taka tihfai tur a ni a, oil leh bawlhhlawh paih tur a ni a, mahse coating a tihchhiat loh nan fimkhur a ngai thung.
Salt Solution siam dan: Chemically pure sodium chloride (NaCl) leh distilled emaw deionized water hmangin 5% (mass percentage) salt solution siam tur a ni.
Solution pH value chu 6.5 leh 7.2 inkar a ni tur a ni a, 35℃ah teh tur a ni.
Thil hmanrua buatsaih dan: Salt spray test chamber (salt spray box) chu a thawk tha em tih enfiah tur a ni a, controllable parameters, temperature, humidity, spray volume, leh collection rate te nen.
2. Test dan tur: 1.1.
Sample Installation: Sample chu test chamber chhungah test surface chu chunglam hawiin vertical lam 15℃atanga 30℃angle-ah dah rawh. Sample inkar leh sample leh chamber body inkara inhnaih loh tur a ni a, chutiang chuan salt spray chu zalen takin lei zawng zawngah a awm thei ang.
Setting Conditions te chu:
Test chamber chhungril temperature chu 35℃± 2℃ah dah tur a ni .
Spray pressure hi 70 kPa leh 170 kPa inkarah dah tur a ni.
Salt spray lakkhawm rate hi a tlangpuiin 1.0 leh 2.0 mL/80cm2/h inkar a ni tur a ni.
Continuous Spraying: Thil hmanrua chu start la, salt solution chu spray chhunzawm zel la, chamber chu salt spray boruak inang tlang takin a khat ang.
Test Cycle: Test hun chhung hi product standard emaw supplier leh buyer te inremna angin a ruat thin. Exposure hun tlangpui chu darkar 240, darkar 480, leh darkar 1440 thleng pawh a ni. Test hi a tlangpuiin routine check tawi te emaw solution replenishment emaw tih loh chu tihtawp loh tur a ni.
3. Results Evaluation neih a ni ang
Test zawh: Hun ruat lawk hnuah sample chu la chhuak rawh.
Sample tihfai: Sample chu in chhungah darkar 0.5 atanga darkar 1 chhung air dry turin dah la, chutah chuan salt deposit awm zawng zawng chu tui thianghlim luang chhuak hmangin zawi zawiin silfai la, temperature 40℃aia sang loah silfai la, compressed air hmangin vawt rawh.
Visual Inspection and Rating: Sample chu a corrosion degree, rust, blistering, peeling, cracks, leh corrosion spread at scratches te hriat chian nan visual inspection neih nghal tur a ni. Rating hi ISO 4628 series ang chi standard atanga siam a ni tlangpui.
Record leh Report: Thil hmuhchhuah zawng zawng, test dinhmun leh parameter te record la, colour-coated steel-a corrosion resistance chu standard kaihhnawih angin a qualified em tih hriat rawh.
