My Whirlpool washer top load has rusted out around area where you put bleach in . I don't know why and now little pieces of rust are in wash tub,when washer is done washing clothes.

Hello. How old is your washer? Is there rust around the bleach dispenser near the left side hinge? What probably has happened is the hinge assembly underneath the top cover has rusted from the contact with chlorine and or fumes. These washers are notorious for rusting at the hinges, especially near the bleach dispenser. The parts involved are:
left hinge arm--w10389421
right hinge arm--w10389240
left hinge spring assembly--w10358931
right hinge spring assembly--w10358932
top cover--w10391067--if this needs to be replaced, call for service--it's a solid hour to 90 minute job for an experienced tech! You have to transfer ALL THE PARTS to the new cover and it's INVOLVED--trust me! If there is rust around the bleach dispenser and underneath the top cover, you might check your serial number with Whirlpool to see if you can get a new top cover for free covered by a service bulletin dealing with rusting. To raise the top cover, remove the top screws from the hinges on the rear of the washer holding down the top cover. Then, remove the screw and metal plate protecting the wire harness and pressure hose and set it aside. Next, from the front, slide the top cover forward 1/2 inch and lift up. Have a friend assist you in holding up the top cover. You can now access the hinges mounted underneath, check for rust, and also see how the suspension rods are mounted(they are very easy to remove since there is a slot in each rod holder located at each corner at the side of the tub near the bottom. You would pull up on the tub, release the top of the rods first, then reach down and unsnap the plastic clips(2) in the center of each holder. Use a headlamp or flashlight to see. The rod will drop down and can be removed through the slot. Reverse the procedure to install.
Also, in case your suspension rods get worn out(the tub has a hobby horse "bouncy" movement), the part number for the set of 4 is w10368625. The proper way to check the rods is to place your hands on the right and left side of the tub ring(the plastic cover over the basket) and shove smartly down and release--the tub should grip going down and pull coming up--no springy movement--just like shock absorbers on a car. It should come up and settle. If it has any bounce at all, the rods are worn--symptoms will be increased out of balance errors or the washer might start banging during spin. I hope this helps you. If you are hesitant about performing any of the repairs above, please call for service!

Stop using bleach in the dispenser. Just put it in the tub after your wash machine has filled with water. The problem is, bleach eats away at the enamel and metal and if you don't have it sufficiently diluted with water, then it eats away at everything---really fast!

Because bleach is a corrosive.

Samsung does not recommend the use of chlorine bleach in this machine. The bleach port is intended for color-safe bleach only. Chlorine bleach is an oxidizer that will accelerate the corrosion process of the drum, which is what you are probably seeing. The users guide for your machine states specifically that you SHOULD NOT put liquid chlorine bleach into the bleach port.

Bleach tends to eat thru the paint and cause the rust. What I do on a call for this is to take the bleach cup out, sand the area and paint the area with appliance paint. Here is a link to the paint I use in case you want to do it. The only way to keep this from occurring again is try not to let the bleach get on the painted areas. I know this is hard to do on a washer but you can try to poor some water around the area of the bleach cup. If you should get the paint else where, be sure it is enamel appliance paint.

No depending on your citys growth rate and repair rate of the lines underground this happens to homes everyday. Another real possibility is your water heater you have not replaced. put an inline water filter on and you will be happy 2 ways no rust and better feeling longer lasting clothes

My 10 year old Kenmore (Whirlpool) top load washer is rusting under the top cover. The entire cover from the bleach dispenser all around is rusted under the lid. Periodically, rust dislodges into the tub and stains whites. You would have to treat the rust under the lid. I decided to try, using "Rust-mort" rust treatment on a rag. The rust would all have to be wetted with the rustmort after some scrubbing with a scuff pad. I have not attempted this yet.
I went to OSH and checked lids on new top load washers. The lip on the cheaper models was not properly coated with paint, and I could feel the rough partially exposed metal, which would rust. The more expensive models had a smooth well coated lip on the underside of the cover. Hope this helps.

Having bleach spilled on the unit will hasten the process of rusting - it will eventually rust especially if in a wet humid setting

Regards

Use Oxylic Acid Crystals dissolved in hot water and test for color fast if applicable, carpets, clothes, washer, toilet, surfaces, etc. Oxcylic acid is a white crystaline acid which reacts specifically with Ferric Oxide, (rust) and oxidises the stain quite selectively. Few teasthingys in a small bowl of hot water and a toothbrush. Purchase cheap at local hardwares Hope this Helps Let me Know Ttech