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Metallographic sample preparation - chemical etching

Product No: P5510200

Ideal add to P5011100, polishing equipment required

Principle

Chemical etching is the most common method for contrasting polished metalsurfaces to reveal structural details of pure metals and alloys. The precondition for a good result in etching is a carefully polished and clean surface. The experiment describes the basic procedure, gives some recipes and presents a few pictures of several metal structures and phases.

Tasks

Check the six metal specimens polished according to Experiment Section LEA 1.1.1 by means of the microscope to see if any macroscopic or microscopic structural features can be noticed.
Prepare the etching solutions and etch the specimens according to the instructions.
Examine the specimen surfaces as to whether the structural details have been satisfactorily revealed.

What you can learn about

Etching
Reveal crystallographic structure
Micrography
Metallographic phases
Metal Microscopy

Materiallist (Excerpt)	Product	Amount
Microscope with incident and transmitted illuminationset with USB CAM, 230 V	62244-88	1
Press for polished section	62244-15	1
Compact Balance, OHAUS TA 501, 500 g / 0.1 g	49243-93	1
Sample set metallurgycontaining 8 metall samples	70001-01	3
Labels GHS, blank, chemistry, 20 pcs	38687-01	1
Isopropyl alcohol, 1000 ml	30092-70	1
Pasteur pipettes, 3ml, PE, 500pcs	36616-00	1
Hot air blower, 1200 W	47540-95	1
Zinc chloride, dry, 250 g	31983-25	1
Nitric acid 1, 40, 65%, 500 ml	30213-50	1
Hydrogen peroxide, 30%, 250 ml	31710-25	1
Hydrochloric acid 30% 500 ml	48451-50	1
Sodium hydroxide, flakes, 500 g	30157-50	1
Ammonia solution, 25%, 250 ml	30933-25	1
Iron-III chloride, 250 g	30069-25	1
Denaturated alcohol (spirit for burning), 1000 ml	31150-70	1
Marking pencils,set,waterproof	38710-21	1
Dish, PVC, red, 300x240x75 mm	85105-01	1
Safety goggles, anti mist	46333-01	1
Gloves, Neoprene, medium	46347-00	3
Plasticine, 10 sticks	03935-03	1
Cristallizing dish,boro3.3, 190ml	46242-00	2
Microscopic slides, 50 pcs	64691-00	1
Spoon,w.spatula end,18 cm,plastic	38833-00	1
Sieve, fine mesh, d=60 mm	40968-00	3
Beaker, low, BORO 3.3, 250 ml	46054-00	5
Wash bottle, plastic, 250 ml	33930-00	1
Glass rod, boro 3.3, l = 200 mm, d = 3 mm	40485-01	1