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Professional Zinc Alloy Surface Finishing Solutions

Pre-Treatment — Technician Levels

Pre-Treatment — Technician Levels

Pick your level to see exactly which pages you should read. Each level below carries its own article library.

Pre-Treatment: which level are you?Four levels - the work you do on this equipment, and the pages you should read.soakelectrorinsepickleJunior1-3 yearssoakelectrorinsepickleIntermediate3-5 yearssoakelectrorinsepickleSenior5-8 yearssoakelectrorinsepickleManagementsupervisor / owner

Process route: Soak Clean → Electro-Clean → Acid Pickle → Rinse Cascade → Dry & Load

8-12 min
Cycle time
60% of load
Rinse water
< 2%
Rework

What each level covers

Junior · 1-3 years
Start here if you are 1-3 years in: the standard steps, the daily checks and the values you must not skip.
Inside: 5-step flow walk-through · daily check list · basic parameter values · simple do / do-not rules
Pre-Treatment → Junior pages
Intermediate · 3-5 years
For 3-5 years: diagnose defects, read real data (titration, hull cell, salt spray, film gauge) and set the working windows.
Inside: defect cause & cure · parameter windows · data reading · option comparisons
Pre-Treatment → Intermediate pages
Senior · 5-8 years
For 5-8 years: how the steps before and after this one change your result - root cause, cross-process reasoning, deep analysis.
Inside: root-cause tracing · interaction with pre-treatment / post-finish · failure analysis · boundary conditions
Pre-Treatment → Senior pages
Management · supervisor / owner
For the supervisor / owner: cost per piece, capacity, staffing, emergency recovery and keeping customers happy.
Inside: cost & payback models · capacity and staffing · KPI and governance · claims & recovery plans
Pre-Treatment → Management pages

Pre-Treatment on the shop floor

Pre-Treatment LineINTERMEDIATEPre-Treatment - process boardOperatorLoad spacing decides everything - parts touching eachother never get clean.ChemistBelow 50 C the soak tank only moves the oil around, itdoes not remove it.QCWater-break test after the rinse: if the film holds,start the cycle again.ManagerOver-pickling costs more than under-pickling - 5-10% HClis enough.STEP 1Soak Clean55-65 C5-8 minpH 9-111STEP 2Electro-Clean3-6 A/dm21-3 minAnodic2STEP 3Acid Pickle5-10% HCl0.5-2 minRoom temp3STEP 4Rinse Cascade< 50 ppm2 stagesDI final4STEP 5Dry & Load70-80 C3-5 minNo water marks5!Drag-in from the soak tank kills the plating bath - rinse twice.COMMON MISTAKES vs WHAT WORKSfrom shop-floor auditsxSkip the water-break test to save timevTest every load - restart if the film holdsxTop up the soak tank with cold watervHold 55-65 C; under 50 C oils just movexOne rinse after picklingvTwo-stage cascade with a DI final rinse8-12 minCycle time60% of loadRinse water< 2%ReworkCASE FROM THE LINECase: a grey film on every part traced to a soak tank held at 41 C for a week.QLQ Surface Treatment | steps, roles, checkpoints, mistakes and a real case

Related: Process Overview · All trades · Process Selection